Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3871826e68000d…

MALICIOUS

PDF

69.6 KB Created: 2020-11-14 08:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44ba121fbe9374ed1c756d047c9f3715 SHA-1: 2cdeed5e1e667b5917397f60820385e3a544fed2 SHA-256: 7a3871826e68000d568bebde0048a763d1cb3a283b6c9f5900ed448d3533fd37
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 0.9998

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://trafftec.ru/123?utm_term=electrolux+double+oven+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f9a3b7fa4249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f8c6aaebe9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_5f98de7d6813a.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/jazojevafapigunatun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f934a23b6bae.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/vonuxagupeduze/che_guevara_books_in_tamil_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xuzowikumozesitegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c517ad-9c95-4790-b0db-711ca7182c3b/gulovifewukuwabil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763a998f-4e31-4f19-90b8-64c319c14d7d/37120159905.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/family_guy_ratings_over_time.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/free_amharic_english_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/mimulojov.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/26292546382.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/zixekugedijesir.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_off0000d27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 5132 bytes
SHA-256: 3ff72275f37e5638cc69e2a74092cbdaa7c5a33a9532361c734ad008d7650596
font_01_sfnt_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 11092 bytes
SHA-256: fa1eaa2b1e510267e103dce7e92abb7b4cb481a1403012a7ebb5ca0d41f9a087

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