Malicious PDF — malware analysis report

Static analysis result for SHA-256 c979993e763a8aee…

MALICIOUS

PDF

93.6 KB Created: 2021-01-03 05:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7079ec2072156c40a4d72c2f994a5171 SHA-1: d15441b53e711f38deb058e595db107485e996e0 SHA-256: c979993e763a8aee7ac0a22a7752cb93e7f0d6c5d045c3e52255c495a4c5c86f
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs, particularly 'https://traffking.ru/123?utm_term=samsung+ice+maker+not+working', suggest a phishing or spam campaign aiming to drive traffic to malicious sites. The ML classifier and ClamAV detection further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=samsung+ice+maker+not+working In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5fcdca9282ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f8b65e738e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_5fb54e2be2b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5fbd2c1f8d1f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5fa83e3688a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fe9065f2db69.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/xogav.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/7964577.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/jjichhp/bearded_dragon_enclosure_temperature.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dobesogum/pidukuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4e2de5-c8b9-443e-a319-45de4400cc07/when_we_were_young_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/gimasatoxoxepidubobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e482aa-79f3-4dd0-9f96-08af6f45b982/59179433265.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 5228 bytes
SHA-256: c4e4eb133b18f8dbd0a407357d2b8c4973a1597e9276c21bf1a38b5f836417d1
font_01_sfnt_off00013608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13608 10940 bytes
SHA-256: 2463fdfbae95582a3ccb9bc1cc22b1aad189dcb782ebb8f2e4d26e641aa47293
font_02_sfnt_off00015b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B45 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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