Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f7b7378942e875…

MALICIOUS

PDF

75.1 KB Created: 2021-05-09 19:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3f899b4f3d0bb5808a9f5b638311f496 SHA-1: b19b3e0a5f845d813f49fea3c17053128e8b1c4d SHA-256: 74f7b7378942e875565be8c922acb2c5712ebc2a1076422d3af076fd66cb0b89
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=2007+softail+deluxe+service+manual PDF link annotation
    • http://rowowevu.mypressonline.com/peer_attachment_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/kohhgir/kelupijepazolukut.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/cjjydS7/47464922275.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/fZ5Hghp/infinite_loop_definition_in_java.pdfIn PDF document text
    • http://haustova.com/89731281477ebqyb.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/gcheWlb/woradok.pdfIn PDF document text
    • http://copyright-notice-ig.com/togikixojugorx107.pdfIn PDF document text
    • http://sodahq.club/64462550316e7uxm.pdfIn PDF document text
    • http://cethq.xyz/kenneth_wuest_new_testamentk0x7w.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/tiniruru/54841632743.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/http_gettag.mobi_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cc6e93-5e9a-4d76-ab2c-b4230d941be9/kenneth_hagin_ministries_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852d822c-a84b-4ea3-af08-d2dd7510b32f/63165988589.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/15315251321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d4aa85-bfdb-4c9d-898f-c037dcb638c5/the_man_that_corrupted_hadleyburg_mark_twain_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/chiari_malformation_natural_cures.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/wisiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9d35c8-b555-48f3-90e8-441509db28f2/washington_dc_museums_open_monday.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/45586755839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46e043a-7832-4e38-a02b-105471a30f0e/pugugave.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_off0000e839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE839 5556 bytes
SHA-256: 5c22256f00f3172e40a841d57dea5a3defd6a548558c07e694d8ae242ca91451
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 10552 bytes
SHA-256: 47d551220c447341bfd85f68e6e13948837eb8846bcb0dd326fe6cccf99029f6

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