Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd0dec631274a89…

MALICIOUS

PDF

90.0 KB Created: 2021-03-23 10:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 534493a4078678de2fc213821a6b9083 SHA-1: 55eb9aa7360e88c36559ea54caf672618191b458 SHA-256: fbd0dec631274a89e88d837541b0ece241913d28601ffc38192b93711bf92600
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=android+book+maker+apk+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489402/normal_5ff6b0fec6ecf.pdfIn PDF document text
    • http://keepsufi.space/61025145483muv05.pdfIn PDF document text
    • https://fozonened.weebly.com/uploads/1/3/5/3/135326763/9d50b.pdfIn PDF document text
    • http://carins.info/mickey_royal_along_for_the_ridewy3oy.pdfIn PDF document text
    • http://belplitka.ru/jimudowamumutohcncu.pdfIn PDF document text
    • http://onlinekartiadesi.com/sadizoxupolodu9buh7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465545/normal_5fe7aa2d329b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_6048f9fe9f117.pdfIn PDF document text
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/pifosudevar_pewetuji_pedasarak_nojeketinukot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_600e8608ce0f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fc987ced3c09.pdfIn PDF document text
    • http://dirtygirl.fun/bolel2j6y6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jevelel/50492796480.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/asp.net_mvc_versions_list.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/ribavobebabedagodigen.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/forwarded_call_notification_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/baseus_encok_a02_manual.pdfIn PDF document text
    • http://sapimidogiraja.rf.gd/hp_elitebook_release_date.pdfIn PDF document text
    • http://gisobugiwe.rf.gd/6518634366.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/cardan_shaft.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/18254958972.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://scripts.sil.orgIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 4876 bytes
SHA-256: e59b00da6c6659dde34af9faa682b767e6607be4ff87465681866507b861a5cb
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 11536 bytes
SHA-256: 58be85dc82e9fe0ed8a4b91c62a596dc91411cc30af0e3d3627fed540663d178
font_02_sfnt_off00012c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_03_sfnt_off00013a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A80 11048 bytes
SHA-256: 3ad79338dfb88d208af4635887af7aab359f97151024dc2f9d0b155fcaf576f7

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