Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7657a2c9204975…

MALICIOUS

PDF

86.6 KB Created: 2021-03-08 08:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a4637de1da2bfa93d3834d39ff2c7ac SHA-1: 116ef585fc0493e5c6ee0e7e21d637c8c0c31cd2 SHA-256: 8e7657a2c9204975960158b900549a44dee36561fa47c86da5786ad6f6d3d02c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=fluval+305+filter+review PDF link annotation
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/mugezigi-vumozapase.pdfIn PDF document text
    • http://wusator.mygamesonline.org/bibudeveriz.pdfIn PDF document text
    • https://sebezubajisiv.weebly.com/uploads/1/3/0/7/130740163/xewur_tepuriruzalem_naxepilejeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_6008c266f3b9c.pdfIn PDF document text
    • https://guwixuwekolarap.weebly.com/uploads/1/3/2/7/132740580/5a47d19123c33b.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/vutalubamuwilaneg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5fcc62d3d020c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_602098f0ba20b.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/some_social_issues_in_tamil_nadu.pdfIn PDF document text
    • https://zapikomamotal.weebly.com/uploads/1/3/1/6/131606370/wuximuvofusag-mojorisanuge-fibururibedun-zusewev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466143/normal_5fc80edc67856.pdfIn PDF document text
    • https://rofukidixupa.weebly.com/uploads/1/3/1/4/131414661/7644555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_602879b5d6f1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_b3a87ffc335142648681cb09c30fb54a.pdf?index=trueIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_7271b88b5e614870b1c487577fdeb62d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/power_supply_test_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/nadaguides_value_reports.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_aec4523d43eb4398a648d98d7c5edca9.pdf?index=trueIn PDF document text
    • http://dijuvunote.onlinewebshop.net/82550779452.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 5120 bytes
SHA-256: 47d63b8f8c5ca167fb510424295027cb088a6289b26966a8e6c0f71ca99983f4
font_01_sfnt_off000127bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 10960 bytes
SHA-256: 7c8268036ce0d98913b839593d5d9b15601cce3d3ae231718e6ee37d1336c285

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