Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec12c1f317ec053a…

MALICIOUS

PDF

85.8 KB Created: 2021-04-29 12:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 47637dc170a3a804abec40321745e63b SHA-1: 129f3f21b013a057bb5c174f7573a418a04bf404 SHA-256: ec12c1f317ec053abbe4ffa5f0d6a2beb017ee9d8253d52bdfcf2c095aa1410e
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=ghost+power+book+2+cast+rico PDF link annotation
    • http://liko-sneakers.com/zazezejuranomidolozi5r.pdfIn PDF document text
    • http://frasqen.online/68948055078umt4g.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/clinical_chemistry_bishop_7th_edition.pdfIn PDF document text
    • http://sethel.xyz/nexibuwijudenomewetujobe0v3.pdfIn PDF document text
    • http://itclick.pro/hypo_and_hyper_secretion_of_parathyroid_hormone9pnni.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/jjjigeX/car_manufacturer_tycoon_apk.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/the_ugly_duckling_full_story.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/haynes_carburettor_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/b2Yuahb/is_64_bit_software_better_than_32_bit.pdfIn PDF document text
    • http://smartcoin.design/york_diamond_80_furnace_ignitorp8q69.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/tagolegebud.pdfIn PDF document text
    • http://salonhq.xyz/vawevumakomuzakubo9p5hd.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/79492837053.pdfIn PDF document text
    • https://cdn.sqhk.co/zesozote/HUghbhe/nabepofejimajidibexupir.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://uploads.strikinglycdn.com/files/0592afb7-233b-46f2-901f-4bf326810985/29881194337.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/27924039999.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/bayesian_machine_learning.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/abcesso_dentrio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22cae094-269b-41a5-b639-d7740bd9ccc6/melozifir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf4ab67-a720-46f4-bc25-ebab2743d52e/wavuto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 5128 bytes
SHA-256: e20ba058dd092823942142b4a18c0c9fbc2dc80376d64fefb698888a6b4a824f
font_01_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 10700 bytes
SHA-256: 28c05a1a4533e0b232e67583deede3cd1f467ef4228e7ba2dae566608993523f
font_02_sfnt_off00013a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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