Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acc514c7bb8c17e…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 18:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3fb1f3381a17584d1138add673141833 SHA-1: ee68e56d41dbee4303e9741fb75ab40c84209639 SHA-256: 1acc514c7bb8c17ee2646fac4b5a20d28790cb6629f030f8eac5fb4119d6d00d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/j79f4cg90vgn48o63cpgppf2v0/buvadapudogemidagera.pdf In PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/38722398643.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18cd5cef9---84107986808.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/34136717816.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/nefanamaxawuzakib.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3cef1bc2b340e52e6ae87d43ec5f4a0d/zozosadivojewozes.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/tisuzifususeve.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/60784846309.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/87949835731.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/kananegarumabetemesusoses.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160915db82479a---fizinasofuwimanaganutuxu.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/37226064187.pdfIn PDF document text
    • http://aweibel.com/Photo/file/jusewapilixaxiji.pdfIn PDF document text
    • https://europartner2.pl/uploads/99316333889.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a645e34afe5---60873019128.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0a2f5073e---mupofaxazolarep.pdfIn PDF document text
    • https://giustofiori.it/file/66103073138.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52df514bf---72434428326.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/abbik66vdslfk6ac7p19250l9p/saxubiwasapalubikijolus.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/97801035880.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vmsb19k19hd7cd08r7gs0o5j82/fogilumetumomitonibifewum.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/a28s23aq32e4t8evqfv61qc2u8/dozobimiwulazadebadudasiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=focus+on+comprehension+book+4+by+peter+ellison+answers+pdfPDF 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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 17684 bytes
SHA-256: 4866f77cba54a53a8df40e11e6e4ead1f8f8a60b595528cde9b584504d29dc4d
font_02_sfnt_off0001292f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292F 11472 bytes
SHA-256: d790d2dd46ba39eed8c9e596d104f8354074b77cdc96e438e0fd86499b8e6b40

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