Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b17caaf8a7fe41a…

MALICIOUS

PDF

66.6 KB Created: 2021-01-06 18:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0cde896d15fcd047bfd2eae66279b7f3 SHA-1: 73185b2947d21d0dd2c1d13dd3fc581c6fa07e61 SHA-256: 8b17caaf8a7fe41aad50c460cfec0b4bddfa8a1e1b81917dccadb151300c2365
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely part of a phishing or scam campaign. It contains a large number of embedded links, with at least two pointing to known malicious redirector infrastructure and disposable hosting. The presence of these links suggests the document's primary purpose is to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=you+belong+to+me+lyrics+jason+wade In PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/marin.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/vobaxifeludiparume.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/cd2d1a282f.pdfIn PDF document text
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/7558332.pdfIn PDF document text
    • https://gibekadizekuni.weebly.com/uploads/1/3/1/4/131452913/bomapup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393370/normal_5feb44a5034ce.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/reviba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1796d6d-a573-4e17-8f84-daee0f60d45d/9534211027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15b0e80-1cf3-4402-bcc1-3e8fd88a60f3/lenojiditom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ef39cd-fbe1-493c-8c78-e1c58cf99f7a/harley_quinn_statue_life-size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4c7b56-0fbf-4b26-8303-f8ae43764fff/gitetifivitubigiloziru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa98a272-18a3-4224-aeeb-0fd561f5f510/lg_double_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f41bcf-b025-459f-b3da-d0dcba2979f1/2732164479.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_off0000c68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68F 5632 bytes
SHA-256: 791b312d639dd846b0e5a6faf8ea0d62846cbce39177b4e5967a0041d021f70d
font_01_sfnt_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 10508 bytes
SHA-256: 635b5d01f28a962c8f901e7ed18fe99d6f7ff51e1a17c5f4a10d57e79ee6d836

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