Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0bd93c6e584a65…

MALICIOUS

PDF

74.6 KB Created: 2021-02-14 05:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d537230c5649416e8ae233170968f7a3 SHA-1: dadebb2b8cd2d09ff4afe6d93a66e7184af68b1b SHA-256: 6c0bd93c6e584a658d910a4408a35725604c1f90f0bc3448ed2dad2b50bb87b8
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=irf630%20mosfet%20datasheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5ffac149a5bcc.pdfIn PDF document text
    • http://1xbet-registr.site/443200379593idku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503584/normal_5ffbcacc9784f.pdfIn PDF document text
    • http://cucoupon.info/17787841349dct0w.pdfIn PDF document text
    • http://kutalevewomem.22web.org/rokekonujemosomakow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5ff6222641bbd.pdfIn PDF document text
    • http://mugedly.xyz/good_luck_chuck_2007_parents_guidec36np.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/eTcibjb/underhandedness_in_a_sentence.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421040/normal_5ff7acb342b98.pdfIn PDF document text
    • http://losmopaka.site/mastermind_game_show_salary3uwlq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5ff366d6b6727.pdfIn PDF document text
    • http://doucheop.xyz/88424337440mb0hm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_601cd50f8b3b2.pdfIn PDF document text
    • http://shoop-fo.ru/sivisoxuminixotyu9w.pdfIn PDF document text
    • http://eliyalte.com/le_spleen_de_parisks0ws.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_600e5eb078bc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigilozixorod.epizy.com/61748476629.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_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 5512 bytes
SHA-256: 5312f00a54ab05f1ce43d8e653376f468af56fcd4cef7b62ca1dd3978332a9ce
font_01_sfnt_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 11348 bytes
SHA-256: fac61b07abb648df7724a38b26aa08caf9e3fc34051a96ea8458c2ce44e99ddc

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