Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd26c60a542d60c…

MALICIOUS

PDF

83.9 KB Created: 2021-08-20 01:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: beda3ebb646ff5fe9ffe6c5e52ab4318 SHA-1: 6df7a606382fbde0fdf0261b015a7fb0bb03aa09 SHA-256: 0fd26c60a542d60cc195252125779fb52724cf702b020ab032e6efe478b8eb72
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The file also contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to distribute phishing content or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cd9668131---tagudetis.pdf In PDF document text
    • http://archi1919.com/smlclub-files/file/85977965758.pdfIn PDF document text
    • https://themalc.org/files/file/saditu.pdfIn PDF document text
    • http://gekon.net/userfiles/file/xitemozizifodavozaner.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/56800356197.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0eb711d26---badonotot.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4a07isvr2trlgens7lots0sm43/fidikotedu.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/29218983659.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/tozupisekiduvota.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80bd0a9f3---48602188561.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ce750701e97---32605934102.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/60811619205.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/79b681e2297a9ffad32d31b004e779ed/12627877927.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/zixudanorepizotodutilikim.pdfIn PDF document text
    • https://assistenza-termica.it/file/paraxogekotaxulunezan.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f42dbe1b---78229526696.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076263b6212d---9233240142.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/89796117577.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/63741364132.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/domeretusakelax.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/gerolafedegurojuriwem.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf38cb5f64---6701754160.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f9909cc2b---kisusapu.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/73909879535.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/84222851847.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de839914e21---wusibusuvatifevafezivek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+painful+is+cubital+tunnel+syndromePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 11212 bytes
SHA-256: 4d491decf73143b8188f1a24df86e0751c256cc36eaab8724d68db9c67189adb
font_01_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 17316 bytes
SHA-256: a6b22bf318bbbe22147298e5fe7ecc280692b70c3941776b115f4f3ccbb8efda
font_02_sfnt_off0001295a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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