Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30f4e557007788b…

MALICIOUS

PDF

68.1 KB Created: 2021-01-25 23:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f4f884a4d8a2cbe81534aa63e9b72473 SHA-1: e9f0bfa265e639d490a2a9169b80ad1e72887d6a SHA-256: f30f4e557007788bc1d21eee04e1fb6f85ff6762b17346cd7fd950be84352b5e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains or link farms, indicating a likely phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links points towards an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=acr+ultrasound+accreditation+fees PDF link annotation
    • https://cdn.sqhk.co/kefekawit/lt4Tjge/fancy_names_for_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/vgihe39/gun_shot_fire_war_apk_day.pdfIn PDF document text
    • https://lusejupol.weebly.com/uploads/1/3/1/4/131406780/dejuxowig.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/XL2hhji/zombieland_2_trailer_song.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/gdienhi/black_beauty_book_summary.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/vmware_64_bit_linux.pdfIn PDF document text
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/linibalafanolevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466140/normal_5fcde400c9fef.pdfIn PDF document text
    • https://modagifamu.weebly.com/uploads/1/3/5/3/135341464/8036619.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/Vial6he/death_worm_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/xhaldgc/69650597987.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/f73cd6922.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/PgeeK1V/disney_emoji_blitz_cheats_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/ihQihRK/kingdom_new_lands_wiki_portal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujuxuvumelijet.epizy.com/overview_forensic_investigation_report_into_steinhoff.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/23980038267.pdfIn PDF document text
    • http://besasasef.rf.gd/tamil_songs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/frecuencia_cardiaca_embrionaria.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/41658867127.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/destiny_2_dreaming_city_unlock_guide.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/editable_templates_for_baby_shower_invitations.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_off0000cfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAF 5004 bytes
SHA-256: 274613eacd4126d32f6bf0113d9cb450a29a0f6e29a2b4779965fcf79b67dfa9
font_01_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 10104 bytes
SHA-256: b6355315f7558763a27fb30c5965ab8b7be1d11e6c1c5c164630b3ab711a9acc

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