Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdb01e054c420f6…

MALICIOUS

PDF

72.2 KB Created: 2020-11-13 07:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0466523705ec401bde17a73aa9558a6c SHA-1: 7c8316b0a7386e86b6e004a7853b506453eda228 SHA-256: 4fdb01e054c420f6d411911ef1d28e9fe161da525890410e6d372a1bf73d6ab5
262 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. It contains numerous links to redirector infrastructure, including 'https://traffmen.ru/123?utm_term=driveway+sealer+home+depot', which likely leads to a malicious payload or phishing page. The presence of PDF-specific heuristics like 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggests an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://traffmen.ru/123?utm_term=driveway+sealer+home+depot In PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_5fa8e2ef30ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5fa7304057615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381997/normal_5fa5bfead1b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5fa4d9c5331ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8c6e65ee8b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f9d8fe57f902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8de37f0ea0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f890173435b2.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/16d74bee-06bf-4a42-b159-58e983e339ff/rojititufikiwitamolarijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71719fcf-89b8-4765-8525-80939f36a92b/21240036228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c374efb-64d6-4f36-bea1-3b777da11d0f/98349611346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128dd71d-d82b-441b-ace6-bdb466f1d74a/magavekepupek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736e941f-1a56-4e14-996e-97ff0b526afe/70322961782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6c686d-fc8b-4fa5-85ba-6b00976f2fdb/roxinomadovipuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c5eb5e-60b6-4874-92ea-ca8a44771055/memoria_a_corto_plazo.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 5452 bytes
SHA-256: 9e7fedb507bf80f94f26a24f2d1e53b30855f20a0e5115e8891a0adb0134963c
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 11020 bytes
SHA-256: 8aa41fdcae56cea2216f67a53f099321922094aaebdc18bc29e43dfb9a9075b7