Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22687d333c99e2b…

MALICIOUS

PDF

72.3 KB Created: 2021-04-01 04:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9cd6e683e64dc0df5f2df74171d6d600 SHA-1: b3199167ccff113a0e1191f65610b00d5383e25f SHA-256: d22687d333c99e2b78e2c39e3d5a7c8c0eadc482e5364eab617c033ee926673f
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as a first stage in a phishing attack.

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://ponafet.ru/strik?utm_term=how+to+reset+the+drum+on+a+brother+mfc+7860dw PDF link annotation
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/87ddea.pdfIn PDF document text
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/1305068.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/dvjbzg3/vitacost_customer_service.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/rumus.pdfIn PDF document text
    • https://gikapizuwixa.weebly.com/uploads/1/3/4/0/134097763/febisol.pdfIn PDF document text
    • http://stebsmeh.space/7951338075351t1v.pdfIn PDF document text
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/4580145.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/gXBhbhj/84687892428.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Z8t3jgk/furreal_friends_gogo_app.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/hdhigfT/extreme_speed_car_simulator_2019_beta_mod_apk.pdfIn PDF document text
    • http://verification-help.business/porakoxobipuromip41j19.pdfIn PDF document text
    • http://kino-vezde.ru/swing_trading_options_coursetfva0.pdfIn PDF document text
    • http://toppiksnack.xyz/khadya_parchi_mpwk9rc.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/woxotopapozokev/interview_questions_and_answers_tell_me_about_yourself_no_experience.pdfIn PDF document text
    • http://vokanagupak.rf.gd/holy_bible_in_bengali_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/78262519773.pdfIn PDF document text
    • http://zunotewa.rf.gd/pearson_physics_textbook_download.pdfIn PDF document text
    • http://nitusul.rf.gd/battery_bar_changer_apk.pdfIn PDF document text
    • http://rewelopax.rf.gd/jofufopudatatubafipawav.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_off0000d7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 5992 bytes
SHA-256: 907a8277e9605ba0f6eb638b3b163057c5380c31d98ad6c43bdb023dd5778732
font_01_sfnt_off0000ec0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0D 11036 bytes
SHA-256: 1be1d2b7ac16c636406676ed74f7c36aac02f1925f6269e5f78a996f67a8fe0e

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