Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e43b39c133de057…

MALICIOUS

PDF

68.1 KB Created: 2020-11-17 18:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2959a7b9202be72780e8400d47b67151 SHA-1: 4194e320c0125933a1a28f1a450e3baed3a76642 SHA-256: 1e43b39c133de0570e7324b4898cfb44b70b97dc64b7bf815b3d4fef645f90ba
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure at 'ggtraff.ru'. Another critical heuristic identifies it as a PDF link farm, with one link pointing to 's3.amazonaws.com/petubapizo/pogipowetapetomorepi.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?utm_term=6+2+skills+practice+parallelograms%252F In PDF document text
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/4386664.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/3688838.pdfIn PDF document text
    • https://ruruzepekasoto.weebly.com/uploads/1/3/4/7/134753799/diboka_leduzowesu.pdfIn PDF document text
    • https://xojajadajopun.weebly.com/uploads/1/3/4/6/134646320/9491982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petubapizo/pogipowetapetomorepi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/52006829861.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/divukoto.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/sekopukonawoferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b245e24-a7f2-4748-b59a-fc334ca78468/sowupovele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51db28e-ed7a-4514-90a4-c5fc387be314/example_corrective_maintenance.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wamif.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/maths_book_for_class_5.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ccrp_exam_study_guide.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_off0000ce25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 5544 bytes
SHA-256: f3c6cff9d93822387875b4506389fe30ebdb918a8d7e31d231dbd97aae9c00f4
font_01_sfnt_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 10040 bytes
SHA-256: d4ca546214833beadf98b50ce2de655eb9635c01eab798441ed589d2ac09bae3

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