Malicious PDF — malware analysis report

Static analysis result for SHA-256 5002bec0d6c6087a…

MALICIOUS

PDF

75.6 KB Created: 2021-07-21 05:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 39b80bd806f0d77786c9d66667007d8c SHA-1: 1bb3b93ba2269a4c79d970365fa94535f7fdd9d4 SHA-256: 5002bec0d6c6087a4eb29c6b8eb8fc6eb9174a52ec82fe2d1ca3c31e549fe938
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the heuristic firings point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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.
  • 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://schmitz.cz/res/file/molef.pdf In PDF document text
    • http://tamker.hu/userfiles/file/mesedososeguvomowenuv.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/24287258221.pdfIn PDF document text
    • https://inifd.london/uploads/file/vadifosuwosipovo.pdfIn PDF document text
    • https://xigmatek.com/upload/files/tipasexorax.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/2589309216.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/kokarifabuxopidu.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/zovaxete.pdfIn PDF document text
    • https://termoformat.md/img/files/zuzeseminezuregosinaxew.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071afeea345d---56250735031.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6c6995d2b---35559651066.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/jagaguzukirabufekixakig.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/14029445475.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/89563924660f783dbeed9c.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f7aaa252---lademuponeposazugu.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/lefugekewuwatafolaw.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/gobojunoz.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/jumujor.pdfIn PDF document text
    • https://isosklo.cz/uploads/nafofetifinuzixabuxomasas.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f3c10e594c8bdd7765d1a72c95ca47f4/70389967678.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/r4s3n7t7i0tsqhaue3p63d3048/podod.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091461f7bed9---mifizewukadelidizigev.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/68f34dda75a361988787f1842e84dd80/82796262576.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/57219621695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=red+state+kevin+smith+streamingPDF 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_off0000c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC479 16876 bytes
SHA-256: e6ec30904309eed9fc2bde3809e4a78cda02ab2bf1a048726f5b6d2bbc7b864d
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 10732 bytes
SHA-256: 47806e1e5bc29d9e1bf5dff1b895f4f66301f86a38851d0c27d80dfcbdb11f59
font_02_sfnt_off00010901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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