Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa937cf323c82d5…

MALICIOUS

PDF

74.0 KB Created: 2021-01-20 04:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c25489e80e310df7119427899fde04bc SHA-1: 94d5ce51b8e8cb94cd1b176db47ff08a8eeb4b8c SHA-256: afa937cf323c82d516c39d10a03362a7dbde3def37713863982fb47c24e72835
156 Risk Score

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 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 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.
  • 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://traffnew.ru/123?utm_term=tamer+king+of+dinosaurs+book+6 PDF link annotation
    • https://site-1174602.mozfiles.com/files/1174602/zigopagetopedeba.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/kozaz.pdfIn PDF document text
    • https://site-1211292.mozfiles.com/files/1211292/fovenixolaren.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/e27bec71f9824.pdfIn PDF document text
    • https://sinuxogutit.weebly.com/uploads/1/3/4/5/134505158/479952f8b6974d.pdfIn PDF document text
    • https://site-1201825.mozfiles.com/files/1201825/ice_hockey_rink_liner.pdfIn PDF document text
    • https://site-1173855.mozfiles.com/files/1173855/savej.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/vodukegilegiju.pdfIn PDF document text
    • https://site-1175941.mozfiles.com/files/1175941/prison_escape_2_new_jail_mad_city_stories.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/sugatemeratifel.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/abasi_ayaya_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/38900218358.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/phd_thesis_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/50955247913.pdfIn PDF document text
    • http://xawezukazekexi.epizy.com/19105297777.pdfIn PDF document text
    • http://zitejilid.epizy.com/smoke_detector_circuit_diagram.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_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 5504 bytes
SHA-256: 5d7c4f07733c614062fdb6486995313e8f6156a7d24753d96df7033507b7ec66
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 11276 bytes
SHA-256: 1124a2d190f1cc6a393027e359218cb10038c4fdec39f52631fa35b1f43053bf

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