Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ef083e70258dc4…

MALICIOUS

PDF

109.3 KB Created: 2021-01-26 09:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0dc66a96786c9410229607e30dc26238 SHA-1: ac2b2baec6906436540d9665f9ce1217e4b03a98 SHA-256: 52ef083e70258dc44f5dd2e9c39918fac3ea293716d21c95a88f5f0fb69cd072
154 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 'traffking.ru'. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=ds+happy+box+not+working In PDF document text
    • https://cdn.sqhk.co/ronofumito/Fu4jhjg/auto_reply_email_outlook_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5fefb3bd6997a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5ff55d72a9357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_5fe7840c8fd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd115ac6604d.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/dgizgjX/lisalajaxavowowifep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fea1dbebefdb.pdfIn PDF document text
    • http://card2card-perevod24.site/all_indoor_water_parks_in_texasei2al.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_60079a71f0f18.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/hhhdhfB/21442225120.pdfIn PDF document text
    • http://makeyourself.xyz/zinezeroluzuxezizerkcc4.pdfIn PDF document text
    • http://tidemelewofu.iblogger.org/16703072992.pdfIn PDF document text
    • http://nasty666.space/529101443963m8x7.pdfIn PDF document text
    • http://itagreen.fun/scary_horror_escape_level_6g211r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390373/normal_5fc7da25024ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varepekolati.rf.gd/catering_menu_templates_free.pdfIn PDF document text
    • http://fobifuv.epizy.com/kekokose.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017d18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17D18 25008 bytes
SHA-256: 42ccb2ef04b5b5f9a02edc2d832adc4eab430a3da3f5c8e65851a70c1689f62e
font_00_sfnt_off0001435b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435B 5512 bytes
SHA-256: 29ca3a945beb831f855867d9d4bcb8a19ab41ee6b679d3a45b2d367f2551cb28
font_01_sfnt_off0001563b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563B 11364 bytes
SHA-256: fd0e845e73329b476bdf22ea35706cc5e70a5f8e87faff60b0af7be78f683a56

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