Malicious PDF — malware analysis report

Static analysis result for SHA-256 176c25c44f1948a2…

MALICIOUS

PDF

75.4 KB Created: 2021-01-22 19:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a3cfe235e4c442eed1bb22571bb78fa5 SHA-1: 3bf324023834f188fcf46347a55eb38a3612aa60 SHA-256: 176c25c44f1948a24ceaba19b3418bd670eaa08e6f35c304b17bdec87393f843
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru', and another for a PDF link farm. The presence of numerous embedded PDF links suggests an attempt to manipulate search engine rankings or distribute additional malicious content. While no scripts were extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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://traffmen.ru/wb?keyword=picsay%20pro%20photo%20editor%20online In PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/5755318.pdfIn PDF document text
    • http://loxesitigogu.iblogger.org/duxevepulide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_600277d7f10b4.pdfIn PDF document text
    • http://rofodas.22web.org/word_2016_tri-_fold_brochure_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_600066636ad80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_60025af3bf39f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nesitojogosew.epizy.com/heiter_bis_tdlich_hubert_und_staller_episodenguide.pdfIn PDF document text
    • http://bujitajaxo.epizy.com/gegisoladotuxinapasinu.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/civilization_revolution_2_cheats_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/hailsham_community_college_6th_form.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xewuka.pdfIn PDF document text
    • http://xoxemofunox.epizy.com/printable_thanksgiving_menu_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/xasupoleri.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/mentoring_partnership_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/manual_de_acreditacion_en_salud_bolivia.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_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 5264 bytes
SHA-256: 514645757820121490bbc97726181ecc0f4ca0addb85e034bacb92bfe3731f39
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 10280 bytes
SHA-256: 37e4f4f213c92e217c8ba79d5704e914c0a00a931aa3093af09c3136b32b8a3e

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