Malicious PDF — malware analysis report

Static analysis result for SHA-256 60aa1e9a24f5d09b…

MALICIOUS

PDF

72.2 KB Created: 2021-04-17 02:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4863ef2e587c77ca2b28165e9a6b4495 SHA-1: 7b0ebb3f7c21bc1105386a7389752173c11ba989 SHA-256: 60aa1e9a24f5d09b477cdb41b2433529df5580083636131815fcc96ae99d3882
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to disposable domains and are used in a link farm configuration, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=dork+diaries+7+read+online PDF link annotation
    • https://cdn.sqhk.co/bitowiso/hjejbh7/doodle_master_glow_art.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/par_quoi_remplacer_beurre_tartine.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/geWjqVX/wevezogubaruxanenu.pdfIn PDF document text
    • http://negeduji.66ghz.com/zener_voltage_regulator.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/betrayal_legacy_rules.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/ncert_9th_class_math_book_solutions_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hUhakuu/fodofitidigunopomevuges.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/70646848908.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/what_is_hindi_meaning_of_inorganic_chemistry.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/42817324740.pdfIn PDF document text
    • http://zukixulen.mypressonline.com/ancient_greek_art_history.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/QdQo9hd/modern_combat_5_esports_fps_gameplay_pc.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/mijumomub/dvt_prophylaxis_orthopedic_surgery_guidelines_australia.pdfIn PDF document text
    • http://wiwexotijakebos.rf.gd/17389720045.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/15639229665.pdfIn PDF document text
    • http://binuxusegewake.epizy.com/sims_3_product_key_generator.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/bovokewoji.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/ganitekawuzitowe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 4960 bytes
SHA-256: ddc16e8ec0fbdc8f9b1b2312c10479e2f969f4e18145da9a0d632515f2002873
font_01_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10420 bytes
SHA-256: aaafab364d28d3dacff30d35a25db3bae82ed9adc5215c351ae89c3be98153e1

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