Malicious PDF — malware analysis report

Static analysis result for SHA-256 a980898fa3dca901…

MALICIOUS

PDF

84.5 KB Created: 2021-08-10 13:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 77387d24dd2558853d0368667e5d9257 SHA-1: d1d8c263ec82937a768a24a230e42effd94e344c SHA-256: a980898fa3dca90171048e880946c0fcc6ddde9fea9a3fa0e40746eebbd612c5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to potentially compromised WordPress uploads or disposable hosting. The document body is heavily obfuscated, preventing analysis of its direct content, but the presence of numerous external links suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://clifestyle.net/uploades/userfiles/file/gediwetagate.pdf In PDF document text
    • https://dcimx.com/files/diguru.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/54734041946.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/55582460205.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/bmc98bs75u6ch6ahlp1st3e3g9/95995179716.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/zedewedetikujijematukab.pdfIn PDF document text
    • https://egf.tw/test2/images/file/putukaruwo.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/kowal.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/6181660167.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99742368a---93042172753.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6f6a73118a95ebda2bf9b1c7330906f6/43929217603.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/138d93ee2280b536fa9b0806a114503d/17343757409.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/tupikasolugalo.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/724a44n8oci9mcpk660b96sie3/20001099212.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/22614877923.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/18143730241.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/065e59b8b9966b62aef35bc8fc662354/rizajazebaxivawunod.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/kerifupututawowurafijep.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/nekenitamidulunokefo.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/82303938561.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/85d996aff13f3bb846221a757de06b3b/sidevi.pdfIn PDF document text
    • http://churchillreunion.com/clients/72216/File/ginojudizibexikutukuvaz.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aab7a0d7bb8---tuvudiwof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mcdonald%27s+menu+prices+uk+double+quarter+pounderPDF 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_off0000e0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D9 11180 bytes
SHA-256: d8d9744537b69767cb75d3bdb1b38fafafa669ad0cbd0e4d017a8b67edc5f23b
font_01_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 17800 bytes
SHA-256: f8f1c8c402ff3fea12c5d2bc21a35d297ef8f42963fc467441620a70180d2e8a
font_02_sfnt_off00012903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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