Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe55f806782c319f…

MALICIOUS

PDF

74.1 KB Created: 2021-04-03 05:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 001c7c716c7fadf8aff21de57d637529 SHA-1: b0b2454a71fbafea0d90f19fd294626006b25d1a SHA-256: fe55f806782c319ff33d5b1476f15170edfe9945709a7eddd715f0a17a3587dc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain metadata related to a sewing machine manual, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=brother+project+runway+limited+edition+ls2250prw+manual PDF link annotation
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/korubo.pdfIn PDF document text
    • http://hookup157.fun/sulomujaratebt6pt.pdfIn PDF document text
    • http://werenntaq.online/health_and_safety_training_paisleyvi38j.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/8044900.pdfIn PDF document text
    • http://dukofinezamidol.22web.org/luwoluko.pdfIn PDF document text
    • https://kojozoxilasa.weebly.com/uploads/1/3/5/3/135302893/3e5832f1.pdfIn PDF document text
    • http://on-arenas.com/gedelibowab6t0n.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/7b71ab908b25.pdfIn PDF document text
    • https://bapiribudiwapik.weebly.com/uploads/1/3/4/8/134885568/lipenut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogivibemijukag.epizy.com/hogwarts_haggadah.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/how_to_create_a_custom_registration_form_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/cfius_filing_form.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_f09a3a65627d40769deb15bbabf9e381.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_cdb0ac89c91949b0863d083216da1c28.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_1643e28b85a94db186b09a532a692d5d.pdf?index=trueIn PDF document text
    • http://vezufokat.rf.gd/paypal_app_pending.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_042046e04a2548a9855aeec63d1db554.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_276fc7c683c34de99261c8230b61a2d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/aurum_blade_unlimited_stats_mod_apk.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_dce785c6077b462cac0b65355a527ff9.pdf?index=trueIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_48a063532318461cafa9d55c23f7a34e.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 6028 bytes
SHA-256: 75f4a78555a73f17b84b5226b5a45fe4a8617d4f9cd7fc421697d5febe1c405f
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10368 bytes
SHA-256: 75f22c8daf8f47001c958dd62b6dec51758c796cf41fa9643e148ecf099404ca