Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfc9c1ae74436e5…

MALICIOUS

PDF

66.2 KB Created: 2020-12-18 13:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 540d23d832d067924b2dff35bf8b8686 SHA-1: 9163ecd4fc9061c2b42291da28b1c1aa97298c63 SHA-256: 9cfc9c1ae74436e5427c374f175b37024dfb5db8cd04c42741e3a932700505da
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or scam attempt disguised as a game cheat download. The presence of multiple embedded PDFs and a redirector link suggests an attempt to funnel users to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://ggtraff.ru/strik?utm_term=tekken+3+cheats+epsxe+download In PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/37827653c3.pdfIn PDF document text
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/2147208.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4d6487.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/wuvagitutadovalubulo.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/4f42ab36-e446-4a85-9539-9355b472a1e6/92586599134.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/94463796814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f49b23d-ea67-4f07-aaeb-e7a7a612b3f4/merowasem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ff34d3-9956-48e4-bc8d-81541af6dcae/pigman_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44bea1c-8490-44e4-adc8-6dc2fef3a093/ladegunusubonod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dc779c-7a9b-47ad-8464-0d2f119e5b5a/tesedasuxijigexujofi.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/94929234363.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/50768081976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5491a403f5353fdb28df9/t/5fc6cb2ea3696915e2107caa/1606863665438/zobutexewuvumigikoxit.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_off0000c6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D3 5400 bytes
SHA-256: 65040bfe6ebf6f86a30308e5789e7353eacb391f3786c878ed47dd8b784149f5
font_01_sfnt_off0000d948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 10252 bytes
SHA-256: 91b33f7e039c5649c5c09acd1f32ebe16b0905f60ab5c483904d37957a4b2080

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