Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9187957123c572…

MALICIOUS

PDF

73.7 KB Created: 2021-03-09 20:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddd045a676c8326987531cda4d478fe4 SHA-1: bb75d98768c7dc030ccd749f7547fa4f156f920c SHA-256: 1a9187957123c572c62cfc973fcbaee4723d85379c3900b564a27f83020521f2
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://xajibur.ru/wb?keyword=what%20are%20the%20disorders%20of%20pituitary%20gland PDF link annotation
    • https://cdn.sqhk.co/repudodo/hghcqVT/fall_guys_season_2_leaks.pdfIn PDF document text
    • http://sedouche.xyz/sedurazavowu0vkzm.pdfIn PDF document text
    • http://sacredname.ru/4053689244749weq.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/uhhohcm/51145298825.pdfIn PDF document text
    • http://wasezaxopana.22web.org/xurojofapijufewelavu.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/rutinupavukalenanobo.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/definition_of_detailed_project_reportt82rf.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/learn_english_with_urdu_translation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_6041df1e1d852.pdfIn PDF document text
    • http://bigwin-1xbet.fun/sentence_structure_checker_simple_compound_complexc5oww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_60102111ae27a.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/CgiWnQB/motor_touring_matic_indonesia.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/94400030587.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/cxiccha/19210696532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakasis.onlinewebshop.net/zepaziwokupaxewa.pdfIn PDF document text
    • http://ragekelovu.rf.gd/aircare_ep9_800_parts.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/zujuwefojuzazosil.pdfIn PDF document text
    • http://nerepigov.rf.gd/xolazamexovugaxupixax.pdfIn PDF document text
    • http://pususarejopo.epizy.com/algebra_problems_for_ssc_cgl.pdfIn PDF document text
    • http://gulavofi.epizy.com/borders_for_word_free.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/difference_between_iso_22000_vs_fssc_22000.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_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5420 bytes
SHA-256: 40b867e8a634902e592bcd3945265adeb8d04a321f364b9848195f4e3091ef69
font_01_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 10560 bytes
SHA-256: 180440ef3fa62593dfb5ad79eb5cffbd43757da54880d93420464be278056f10

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