Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c53df194efe804…

MALICIOUS

PDF

76.5 KB Created: 2021-01-09 23:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5925433666c2a7ad330a111cfcbaea40 SHA-1: db67ee759b786a38aff58e7825245e49c5cfd7bf SHA-256: b5c53df194efe8047b3f3964943d4742beecc8776f5684c744ceff87d3692527
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of embedded links designed to redirect users to various external websites, masquerading as a free download. The primary redirector URL is 'https://traffking.ru/aws?utm_term=kannada+astrology+books+pdf+free', which is part of a link farm infrastructure. The document's structure and numerous links suggest an attempt to manipulate search engine results or distribute malware through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffking.ru/aws?utm_term=kannada+astrology+books+pdf+free In PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/ddcabb89d.pdfIn PDF document text
    • https://sofifego.weebly.com/uploads/1/3/4/8/134899758/cc4f9bef442e.pdfIn PDF document text
    • https://dobumixil.weebly.com/uploads/1/3/0/7/130738680/c38ef8ab.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/zajogepowojoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_5ff4fe18eba4c.pdfIn PDF document text
    • https://nuzotononi.weebly.com/uploads/1/3/4/0/134012627/boguzabejogen_gezufovegego_ladaweror.pdfIn PDF document text
    • https://lejonajij.weebly.com/uploads/1/3/4/6/134651266/3187270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f87dcac7cc7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478950/normal_5ff0f7590f7b4.pdfIn PDF document text
    • https://site-1177169.mozfiles.com/files/1177169/let_s_talk_about_love_images.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/2rm4zid/today_s_weather_hourly_erie_pa.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/503989.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
stream_004_off0000e586.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE586 6744 bytes
SHA-256: a201ada5caad408e61216fe4a3334b1dfc938321c2c79298880b0de724a2b198
font_00_sfnt_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 5484 bytes
SHA-256: 89ece880c4437f9e33015698d896e1fd9c8cc076c85b5ae9cd1a155ccea0924f
font_02_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 13488 bytes
SHA-256: 70aa66f220c3cd09dbbcaad50ba50a2ea0c9ffc71e8817692476fa2c733513ae

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