Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf761ca1740571ab…

MALICIOUS

PDF

80.0 KB Created: 2021-02-25 19:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 275b6136e746a552ac914b952f27478a SHA-1: d640f00a64ccea91d1dcfd581aa6e8465b23f6f1 SHA-256: bf761ca1740571ab6a8bcea3b598f8c51e87984f4278aa59e3934dd19c0db553
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or scamming operation. The document body, though heavily obfuscated, appears to contain keywords related to reading tarot cards, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+read+tarot+cards+for+beginners+pdf PDF link annotation
    • https://cdn.sqhk.co/sebutarukaw/KjgTAja/dungeon_maker_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_601a66f9d22d7.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/7BOKkhh/pocket_door_pull_height.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/iehijdI/nom_de_la_plante_carnivore_dans_mario.pdfIn PDF document text
    • http://gogotmif.space/77019250892o533e.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/5be9bae.pdfIn PDF document text
    • http://vinograd.io/how_many_calories_in_a_slice_of_dominos_philly_cheese_steak_pizzabg6d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413845/normal_5fe5b020c5c02.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/FjbyP1J/hit_radio_page_officiel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506131/normal_5feeace2bd12c.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/mobapuwote-dakufe-tadebaba-fikim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5fda8531db3e9.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/nagudo/dasamegagikonepilol.pdfIn PDF document text
    • http://milazadizuwi.rf.gd/the_chemistry_brand_retin_oil_review.pdfIn PDF document text
    • http://tupusivamiguta.rf.gd/embryology_ib_singh.pdfIn PDF document text
    • http://wesawujejo.epizy.com/what_double_strollers_work_with_graco_click_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/47432353512.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/18454719793.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/imran_khan_punjabi_singer_songs.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_off0000f9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D3 5484 bytes
SHA-256: 3b3716fd61cf9796f535299bbb115f91219992928e15b53dc808526357dd2429
font_01_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 11424 bytes
SHA-256: a930d7661767cfcfa619a02c8521a81d598d1997354997716d127fdd9d9bcf5d

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