Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bba0806655e2574…

MALICIOUS

PDF

82.8 KB Created: 2021-04-16 14:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5abb30541e256e9021a39bff9f9228c SHA-1: e5229b503bf429762c680873a6b8805b313a869f SHA-256: 6bba0806655e257422e0e887fc22f180389d7a226e6956a20a02d90b8f4b5fc0
126 Risk Score

Malware Insights

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

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 0.9997

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=girl+from+ipanema+stan+getz PDF link annotation
    • http://lanutovuvilug.iblogger.org/kevokavujime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff815ad45c47.pdfIn PDF document text
    • http://mirror-x.org/black_law_dictionaryxohzg.pdfIn PDF document text
    • http://rerubin.space/drug_handbook_2020_freelnpza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5fcfaefead8f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_6026dbdedd5d2.pdfIn PDF document text
    • http://pugumatinudozid.iblogger.org/is_a_blackthorn_dangerous.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_60296add1cd57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe285a1a3733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_6063602b294b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_604f01556262a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_6067e80c58571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugemanuzori.rf.gd/luwamasewir.pdfIn PDF document text
    • http://lipetefafozil.epizy.com/accounting_audit_and_income_tax.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/waganijixawevarujuk.pdfIn PDF document text
    • http://sugebajofurite.rf.gd/dexupotip.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/what_does_mars_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/povukidejepavufalakes.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/1429845749.pdfIn PDF document text
    • http://xamorapex.epizy.com/the_book_of_life_movie_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/3014211229.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 5300 bytes
SHA-256: 7f430b6082f27821e08ab13984d635221072e3c3a699b2e9681ab4e1275bd1c2
font_01_sfnt_off00011735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11735 10984 bytes
SHA-256: 9099a85f12169f15efc3a189a0b4a0583b9b0dd18fcddf447432defc162fc2d8