Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89be171080d66d0…

MALICIOUS

PDF

69.5 KB Created: 2021-01-06 16:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fb3443dae9d745a9689619964257592f SHA-1: 9011681bb4a41edd65f7c0f680108641f529dc6d SHA-256: c89be171080d66d07a335a0cc2497c6c61f5e6ac47076400dd004c9d9ee7c2e1
222 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 at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The 'SE_URGENCY_LURE' heuristic further supports the phishing or scamming intent by indicating the document uses language to create a false sense of urgency.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=darnall+army+medical+center+pharmacy In PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/4061156.pdfIn PDF document text
    • https://cdn.sqhk.co/vemoderama/l0hehef/53070799538.pdfIn PDF document text
    • https://cdn.sqhk.co/biserodafed/jjahgTI/42892986586.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/3b28e0f7-52e9-41c6-8e99-2699fb18a1db/boxazukomike.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/battery_report_mac_os.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/cazaly_s_stadium_cairns_pitch_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/etrian_odyssey_nexus_classes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/ap_us_history_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/muriniwazitepeb.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/bewise_classes_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/vuetify_datepicker_format.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 5236 bytes
SHA-256: d5a04c59e6e74ee6d82ce31fdfa18efae79c3abcea701db55d3f13a65657fb8c
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 10148 bytes
SHA-256: 15bc2ca0904b98421a479469967e0e211ab42b47a57a87f2bf34c26aa4d3129b

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