Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dcf89e11cb3ff1…

MALICIOUS

PDF

66.9 KB Created: 2020-12-01 19:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8d924113761169c2ae4adf28c695e550 SHA-1: d8b903363e484c61cac28f7714e4e00bc92534f1 SHA-256: 74dcf89e11cb3ff197efc09b95ff143f7d61033cb64273e95b81a72c0fce1d11
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=register+hp+printer+warranty+singapore PDF link annotation
    • https://zigexumo.weebly.com/uploads/1/3/4/7/134729800/pilivodulud-wozuboriwe-luwisino.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/3ebafe21-d06b-4314-af34-b70888fbf865/xaxemoxajef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157a09f5-6cd2-49be-b69d-9558fdabd7c8/gipuvinexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d4fa28-5ca6-4960-b0c6-9e72395d8dab/highway_pursuit_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/husqvarna_610_viking_sewing_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4e27bf-1bf0-46e2-a72d-7ec93e0f7791/pimuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc20809eaf37e3b64e320f4/1606551562970/jamegokipufijusafubafax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2ae122-35a2-4e9c-97c2-62a8739e9428/zizuwepoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e91fc26-7486-4554-ab12-ca93d531574e/zaviditoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafaf423-feed-46c7-99ac-a5ba4a3ededa/manevikuxetowajesidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7410102f-3708-48a3-874d-19f17ce01c75/kinizejugoniboniso.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_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 5252 bytes
SHA-256: e3831cf3465abcdf432886c4ac2b419a29c4686e9494cf515480a6d8f48d7b44
font_01_sfnt_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 10132 bytes
SHA-256: a3c9b6ed0ec921ea85a34ee5c3a7b22da4c84e8ad3fe8d1a01be0d2288fe5fbf

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