Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75d1e38a919e871…

MALICIOUS

PDF

86.2 KB Created: 2020-11-26 01:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3c06566e84afe89af2e3000dfaa0cffe SHA-1: 25f6bee4ccc3b34db1f0623222432cc496477b0f SHA-256: b75d1e38a919e8713b2c47ca03a92ba0787492e90c048e07548db4fb9a57ae25
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://gettraff.ru/strik?utm_term=magnum+pi+costume+couple In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fa08baa89836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5fa0410c8efb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5f90a0c89181f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f93f8e63ad3d.pdfIn PDF document text
    • https://mavevataxivira.weebly.com/uploads/1/3/4/6/134600118/fazubole_rezajokav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f8c8366a1e93.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4242220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fa96478616fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f8d3f31410c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5f9db36559548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478141/normal_5fa8d3b594cac.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/nokiva/support.nintendo_error_code_52030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb7ba31-1c96-4656-9496-4e733ac35e85/87541651160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a43c207-343a-4cc2-8ca9-f5c6791431e5/ejercicios_de_la_letra_t.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0248432-a8ff-4a9f-a6c6-4254905cb901/99320330562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e4bd32-01fc-4b42-93c2-b897476780a7/xaboxedosarofofusava.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/the_power_of_focus_by_jack_canfield.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_off000113ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 5160 bytes
SHA-256: 1ba7990f1da9b2834ba128596b0dcb29c6143412fb52cea2b79edaf4e1d71b2f
font_01_sfnt_off00012578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12578 11208 bytes
SHA-256: f2803f1b60f657099ea3dd3a5e15086d5050c106975f6b0e5e1013512ae2b57b

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