Malicious PDF — malware analysis report

Static analysis result for SHA-256 95295c64e4dfca56…

MALICIOUS

PDF

77.2 KB Created: 2021-01-12 00:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ac47c62ad7134faab54392fc7f66a2a2 SHA-1: 9e3c82553d3856ef7406e45310a8adfae8af818b SHA-256: 95295c64e4dfca56d4e8669d1ae3c7b4370571f61e5075813f73904ec56ceff4
204 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 pointing to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body is heavily obfuscated and appears to be a lure, possibly related to the 'guest house rules template' mentioned in one of the URLs. The presence of these links strongly suggests an attempt to direct users to malicious sites 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gettraff.ru/aws?utm_term=guest+house+rules+template In PDF document text
    • https://cdn.sqhk.co/lafugafeniki/eRhhwSR/muziqlo_mobile_rhythm_games_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/ifhhBhe/7927381144.pdfIn PDF document text
    • https://site-1221793.mozfiles.com/files/1221793/canon_ip2700_series.pdfIn PDF document text
    • https://cdn.sqhk.co/pofilese/ieW7jj9/jump_the_broom_movie_ending.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461202/normal_5fe1951e19b6d.pdfIn PDF document text
    • https://site-1174105.mozfiles.com/files/1174105/funny_amazon_review_photos.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/14955670680.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/hbLuEcP/helicopter_rides_orlando_20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f88b6db90303.pdfIn PDF document text
    • https://site-1176629.mozfiles.com/files/1176629/65207887408.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/ibpiijg/project_management_tools_and_techniques_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_5fe9d0dcd10e1.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/ZVdiard/jowijidadinevolijirega.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/cSijije/jirosobom.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/fovezewi/can_you_itunes_on_android_tablet.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_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 5088 bytes
SHA-256: 9ade6b876cd4744e1dac79fe3efcd2bdb91fa2c2bee6a31cb1f3615e3633d9a8
font_01_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 10972 bytes
SHA-256: 815d58cb920845244c24e8ea178212b8f4534a49ac36ddc59eae1652dd724933

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