Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dabf1ee45d7d2c…

MALICIOUS

PDF

97.1 KB Created: 2021-06-27 10:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 93ff5637ed5ed73bd1adfbd079355a65 SHA-1: 56e2ee670e0862f7daa0996164090886445e04c3 SHA-256: e8dabf1ee45d7d2c66394e939a03202ba69a67853931eeb77fc949936e05f1a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicative of a link farm designed to phish or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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 http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7506c176f---pinovesiton.pdf In PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/83625008072.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/fomogezetogarebazodejata.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/poxubalalejozodokiw.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c695bc9e722---derojobejugop.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ba1c52e0a---nimitojupapadijiwanerirez.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/fatafidunub.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d712f5a1832---79049570323.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/xoledukivedonozatufefudi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087c42e5801c---nizikimadinamulitivi.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1497494a4---xukutefi.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b076ef13a35---nipizevu.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a425cfc5ad7---davatiro.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e1693e6f0a6ac5522d2485dc773fd77b/11695309653.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6bd385ef159db9b3220fcedc254e45c0/11881685678.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a270cf2812---sarevumakifetudesekanajo.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/dinitesojojeruwelosepaloj.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d095a2cdcb0276abb03db006705b1d66/93026804657.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c3228d6777053e1ef2cddcfe25bb2a3f/66490957108.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16089d8fc5fb06---xasagapuselutebofifi.pdfIn PDF document text
    • http://sam-global.info/files/file/dakirigoweturiwad.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/309f1c9a044c433e6da681b99657e349/93282553681.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/61487221477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what%27s+the+definition+of+polytheismPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1de547196a5a5079e15ac46249bd43fb/35662267768.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 2448 bytes
SHA-256: eba1a8451860ce297b9675215508f14c6d3b8b415a408231301a4de1c823e4a6
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10953 16768 bytes
SHA-256: 5ce9a28c1883745156743d651a1fb2d21d4442ba71fcb02507d145f695fae770
font_03_sfnt_off00012157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12157 10804 bytes
SHA-256: d98e2e4e06e1c7c5ff74a21eeb1be7e7a57de1b70831c1478187f1d7d120def1
font_04_sfnt_off00013a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1B 24560 bytes
SHA-256: 2f6cf8b9311e8a08ca91c1f7c28bb4f363c580043e3f499dbbd366330ca07fd4

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