Malicious PDF — malware analysis report

Static analysis result for SHA-256 b930e8fd3424670c…

MALICIOUS

PDF

87.4 KB Created: 2021-07-07 10:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1b4c530f75bb78c35f6a1d4c12776d9b SHA-1: 3722660f7eb2a9719abd7c3e5d5f9920c71bdea6 SHA-256: b930e8fd3424670cefbd3b1ab432fc123b38b6240089d5c21408b34be7d81112
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

The PDF document was flagged by multiple heuristics as a credential phishing lure impersonating the brand 'Apple'. It contains numerous links, many pointing to compromised CMS upload directories, designed to lead the user to a fake login page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+answer+to+a+subtraction+problem+called.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kfo6rcntsjcptmrgvt95rd0dbr/difogejodilodilimurovope.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f673bc6ec7---xoresimefikokuvupuwu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/be1d8690a7c55e5f17a40914353c234a/9216552177.pdfIn PDF document text
    • http://duhochmis.com/files/uploaded/files/56870590833.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a7bb81d8f98215912ef8a7b186517397/fitiza.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/532f012823b70a4cc48588656e052a37/bowoxosanugog.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caeb4d3c0a---96009740543.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0845a30c0c---94978345965.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/53a30e90ae4950791fc2817bbfe0517c/tibazemogifazab.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48bd6533f5---wugubiresobawedagarag.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80a9552f0---tosasusudikatakimix.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2deb2de7d0---80635640006.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/75205233920.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b67c44919---9757663244.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/oqrnulqbes313spjg6cu0nrr5t/63248041409.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8eob32a185cj19k4u77f2qj1q3/zagaperok.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/juzepurukenu.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/37127168912.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/gudurijawaf.pdfIn PDF document text
    • https://rintrans.com/files/85881621795.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f7b09d293c8d0e18d20d50a08e3f448a/24093776837.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/40070433349.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/tipizabeporokelekadamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+answer+to+a+subtraction+problem+calledPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 17100 bytes
SHA-256: fe987069ee0423df8c99f96828b6ae80e083af90247af1b2e546fadef89397ca
font_02_sfnt_off000136ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AE 11100 bytes
SHA-256: 79e08302555787bee8772cdc5fb9126fa763c6f76bcbd645b17ca50e29c3f56d

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