Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ad96c792fbaf49…

MALICIOUS

PDF

79.5 KB Created: 2021-06-09 21:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 83e0508da45a2891873f4df157b2bfe7 SHA-1: f7f929a819b681b1447e1bb588b091c906f9901f SHA-256: 57ad96c792fbaf4974cd19c093cf08733ead63d24007ff7c938e13d5e5aaacba
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/pbw?utm_term=hoodia+ielts+reading+answers PDF link annotation
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/456246.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/b71009a.pdfIn PDF document text
    • https://vanonages.weebly.com/uploads/1/3/6/0/136083008/9122035.pdfIn PDF document text
    • https://saronikevuvu.weebly.com/uploads/1/3/4/4/134460573/vasokusewilakiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_6025c20560fd5.pdfIn PDF document text
    • https://zaranofe.weebly.com/uploads/1/3/5/9/135967679/sodagepana_polanupisuze_sonivaz_keleridepov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_6016413c9ae94.pdfIn PDF document text
    • https://potemoguzoka.weebly.com/uploads/1/3/4/6/134646314/a649e4ef78e9.pdfIn PDF document text
    • https://xokufilamiv.weebly.com/uploads/1/3/1/4/131437438/zolesekodidisizafuno.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/wesovakuriw_kiwewovufada.pdfIn PDF document text
    • https://tovujevimus.weebly.com/uploads/1/3/7/5/137512848/1767238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosiravuga.pbworks.com/w/file/fetch/144659880/how_to_start_laser_x_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbe8817-8961-4399-90bf-d61aae645f95/qualitative_research_design_sample_thesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d7b552-6f2a-493c-9ad0-1a11056d1e4d/can_black_onyx_go_in_water.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144481200/xifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9330e6f8-66c6-4fcd-98e8-d206d4dfb51b/how_much_does_a_fitbit_flex_2_cost.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/would_rather_exercises.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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5044 bytes
SHA-256: 964af3d405559fadd96b454842e535d513bc325769316f0dd1741a3098cb2007
font_01_sfnt_off00010da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA0 10428 bytes
SHA-256: b519f42b653fc6bae2b0e1ea33afd3bf33fa27aa7160e496825af2629347519f

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