Malicious PDF — malware analysis report

Static analysis result for SHA-256 00230a1f1c384bfa…

MALICIOUS

PDF

92.1 KB Created: 2021-01-16 23:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 788274d4d24d209482c02b5405635fe0 SHA-1: b9dda8295f74fae1f9d502159f161f4491352d53 SHA-256: 00230a1f1c384bfa7508c0660d4628a8c6717cfd05a3a3233c62fa418bc8ab7b
214 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or trojan delivery mechanism. It contains a link farm with numerous external PDF links, including one pointing to known malicious redirector infrastructure at 'ggtraff.ru'. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice users to click the malicious links.

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
  • 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://ggtraff.ru/123?utm_term=grade+9+math+module+answer+key+with+solution+1st+quarter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fb296b13b781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384310/normal_5ff1d7299eefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499942/normal_5ffa42ba8184c.pdfIn PDF document text
    • https://sofabavoxikavup.weebly.com/uploads/1/3/4/6/134636307/todisofetosajoj-podezet-dolutawu-minuwexuginol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_5fd84dc1b5568.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/J8ierjg/93364883490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5fc2989a48b80.pdfIn PDF document text
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/dbd922f7184d9a.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/bugafarodesop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_5fc06d818855d.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/Bhd5qe8/hidden_objects_games_online_free_no_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f99364f8401d.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/kuxuxemu/mutalate_a_doll_2_un_blocked.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/45449435801.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11655 5572 bytes
SHA-256: b5797f8b032a42911bb63e809591dd97f836800fa2628c85d5bcdb1320ea6e2b
font_01_sfnt_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 13048 bytes
SHA-256: 055f306092c583c68a11c851ce10573ef684d88017c007edd387e8169fd1f881
font_02_sfnt_off000154b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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