Malicious PDF — malware analysis report

Static analysis result for SHA-256 468f1067c5a580b1…

MALICIOUS

PDF

65.7 KB Created: 2020-12-01 09:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a8b347ddfd79dc063108aa31f247d9be SHA-1: b627beb13f116d231005940e954cb5a6c26110bc SHA-256: 468f1067c5a580b12db1959180219fe9df74ad12162552ab885152f5df7050ae
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links pointing to redirector infrastructure, identified by heuristics like PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. These links likely serve as a lure for phishing or to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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://traffking.ru/aws?utm_term=architecture+floor+plan+app+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4478146/normal_5fc4ff404e92c.pdfIn PDF document text
    • https://kijaxezadu.weebly.com/uploads/1/3/4/5/134590125/a889d79292d4fec.pdfIn PDF document text
    • https://lukikezifad.weebly.com/uploads/1/3/4/7/134756415/fasuzeni_sukewebegebusem_madelasu_tuxukipal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fc5a5f0eefbc.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/funotom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_5fbbb67a8e434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414175/normal_5fc59122e23f3.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/55f68711-c52c-4892-8a7a-958df3fea77b/taluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b107b5-c49c-4a3e-b47f-63e15ec48094/jack_johnson_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a4ed2f-f3d3-47ef-b3a9-d613b24f7d39/xejarifodovaxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2deb9f6-b4ff-42c4-904d-bbba7c7613fb/peferafewolax.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_off0000c4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BB 4980 bytes
SHA-256: f2973bac5fbed5b5ad5a45e4eef7fb415f4a1ff7a8dd8ce7cbe2bea0da32e201
font_01_sfnt_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 10752 bytes
SHA-256: 02000142425656f4fd36d4e5839fb508a8ba381f218348b50c176c9ca7258e78

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