Malicious PDF — malware analysis report

Static analysis result for SHA-256 08624289e87da9cf…

MALICIOUS

PDF

78.4 KB Created: 2021-04-22 22:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5fe07383c852598fc8f91098d3ad5dd8 SHA-1: b0774159f72cb4e3357000ba41894b7b630178b4 SHA-256: 08624289e87da9cfe8788a3266832c9aaf61f82936ad12509d7f33c7058ac537
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://zajinet.ru/strik?utm_term=creative+sb+x-fi+xtreme+audio+sound+card+driver+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475588/normal_5fe691940db7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_6037c26106c5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427287/normal_6004e35a43e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_606c81b467989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402718/normal_5ff6620632f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_604bae9e62b0e.pdfIn PDF document text
    • http://hookup673.site/61207539134069gm.pdfIn PDF document text
    • http://bigpleasure.ru/pathfinder_character_sheet_form_fillabledtqha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fd92d94064fc.pdfIn PDF document text
    • http://immorta-cross1.club/235233729589r21j.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/fuwawibu/39293137342.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/neil_gaiman_sandman_comic_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/how_to_do_binomial_theorem_on_calculator.pdfIn PDF document text
    • http://kepukafinuma.rf.gd/berichtsheft_vorlage_ihk.pdfIn PDF document text
    • http://zugotival.epizy.com/5000_most_common_english_words_with_urdu_meaning.pdfIn PDF document text
    • http://dakarudadujo.rf.gd/fuvomisosufidog.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/koresakonidi.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/alcatel_one_touch_pop_c5_firmware.pdfIn PDF document text
    • http://genavologu.rf.gd/pavebegijonapizibu.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/chemical_engineering_thermodynamics_equations.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/phrasal_verbs_examples_in_english.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_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 5464 bytes
SHA-256: 98cb2fe459540444edaa76ed248255a45b7ab6ad402cc7ac43664b74aa089990
font_01_sfnt_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 11248 bytes
SHA-256: ccece2ffcc3d0ac85edaa7d1e14e680d1801761da6294f40c8a23b12a89bbf8a

Open this report in the interactive analyzer, or submit your own file for analysis.