Malicious PDF — malware analysis report

Static analysis result for SHA-256 662482aa54492ef3…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 18:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f9697c3c79b08be4b19f3afcb210912e SHA-1: a9a2cefbe2b79f55cb6258f8be4fa4368abd549d SHA-256: 662482aa54492ef3c4a41c6a110ec0af6d4eee3b6d8162334ad341dc353f929a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to initiate redirects to malicious websites or download further payloads. The numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, further support the phishing and malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://crewmak.ru/uplcv?utm_term=humanism+theory+pdf PDF link annotation
    • https://aartipalette.com/userfiles/file/10997181658.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/43183394021.pdfIn PDF document text
    • https://mfdesign.hu/files/file/74764219868.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/27646718728.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/42903137081.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/47653145982.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/52990175561.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f11b3148fc7---89989576449.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/9400747579.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c181105158---jularalatebogodopo.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/jsbj6gn8gnrdooafcl5sn49q49/6635391319.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/52b12d4ec56dcc51f785d6acab6b3f2f/vazubufiwatu.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/31392637264.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/84812680631.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/71586270781.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/67229592821.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/71523844151.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087db16e5d1d---tubuginopawalol.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/79629547655.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/12ae6ee63377a7e5dd5fc6590a00fced/madixesadejoxegogodezigad.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99caf181bacf81a3c0f53efce639c264/namuzelafijumifuna.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/votejewu.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/95009629710.pdfIn PDF document text
    • https://masihpt1.com/contents/files/verut.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 10924 bytes
SHA-256: da6efe9b50e975f76e1cafca1b8d6efb2f277f449ef391625f910122016c47c7
font_01_sfnt_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 17972 bytes
SHA-256: 222e2a8813b12cca2bc8dd057746348660eef90c58d8826a44f15463e7b6cabe
font_02_sfnt_off000118d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.