Malicious PDF — malware analysis report

Static analysis result for SHA-256 306cf1b445cbcb6f…

MALICIOUS

PDF

86.9 KB Created: 2020-11-22 18:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dac0e2d9d39f0a5c7d46c1c8ace31ac5 SHA-1: 996fc86b9a749714cf0bcc2504870602780c031c SHA-256: 306cf1b445cbcb6f04fe3143f91180f0a95314e74a1aa1c281a638b0f3a0d56c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a link farm and an SEO redirector pointing to 'https://trafficel.ru/aws?utm_term=behave+sapolsky+pdf', which is likely used to host phishing content or distribute further malware. The PDF structure and embedded links suggest an attempt to trick users into visiting a malicious site under the guise of a free download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafficel.ru/aws?utm_term=behave+sapolsky+pdf PDF link annotation
    • https://rurirenaw.weebly.com/uploads/1/3/4/6/134652156/fumipijexu.pdfIn PDF document text
    • https://lerafajim.weebly.com/uploads/1/3/4/6/134667367/8477749.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/nasow_wovimulatu_geregos.pdfIn PDF document text
    • https://wuwawibef.weebly.com/uploads/1/3/4/6/134608234/pisab_vokom.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/fokapikow/sezixofumuwezem.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/39331206.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/songs_about_bullying_someone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a8d5f0-6f20-4de4-bff5-ea16d6fff43a/44107411830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82734074-d4bb-4d1a-8f5b-4ec9556086c7/sweet_filthy_boy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97bcf80a-5533-40c9-8b81-7de7c0d30d96/13940883203.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/zuxuvowedomazatevewumazur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6653bd86-38ae-4791-abc0-eb457d2fc154/iof_orienteering_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f5f019-8a3e-4e85-9547-468fe5eb7a1c/7128617746.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 5308 bytes
SHA-256: 845b50aa14db144bb485c4bd87ec8c7ae8b4b819a52184f38ed2555a970b2030
font_01_sfnt_off00010e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E95 11664 bytes
SHA-256: afcdb97296b6d30ed58c8291fca2c8d6c3106ba2b95d2397dfcc3ae401ff5465
font_02_sfnt_off0001349e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349E 17640 bytes
SHA-256: 4b43dde5b42bce9ac09a95844f70b62c1ebb81b7d4013a4a0524b4f449e25395

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