Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe424e4cecac225…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 16:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 243889e4f83cbedb821e61c2e711afdc SHA-1: b2151d7bf0c973263753cd4d991d408c3c87ea12 SHA-256: afe424e4cecac2256a7809065f5bea560a07b50726c69d66fd2f26c0567025d4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL suggesting a lure for a printer driver download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, further supporting a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xajibur.ru/123?utm_term=hp+designjet+500+plus+24+windows+10+driver PDF link annotation
    • http://tepoparupomo.medianewsonline.com/how_to_workout_to_gain_strength.pdfIn PDF document text
    • http://zhigina.ru/amu_controller_phd_form_2019nb9yn.pdfIn PDF document text
    • http://monongzhlh.space/fiweww0eof.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/selalunevazavetapijar.pdfIn PDF document text
    • http://weex.info/winaxekufedetipobovux5h6j.pdfIn PDF document text
    • http://winoraama.fun/mifofobakipemudabivurofov2pi2z.pdfIn PDF document text
    • http://idealsit.fun/workbook_worksheet_vba65jf7.pdfIn PDF document text
    • http://notdull-eng.online/log_p_h_diagramm_wassergc5df.pdfIn PDF document text
    • http://homiak.fun/the_devoted_friend_oscar_wilde_reviewm3xqg.pdfIn PDF document text
    • http://creditpm.com/lugogilaxilodajeleviz22p1q.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/davubewu/nursery_english_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/dario_battistella.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ef39fb-6b59-4fd7-8342-532c5e64ecb4/how_to_program_genie_mini_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5871b171-337c-4810-90e6-a19b121b28cd/59195474429.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_44e945c6b21f48df89d5b205f0f349b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitirew/amoeba_sisters_video_recap_homeostasis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/amcol_systems_on_credit_report.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_d9c1fba411c848d38146d156e398f01e.pdf?index=trueIn 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_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 5644 bytes
SHA-256: 4fd3891ff17ff73293e4fa268cb325b6c9c2b2e9a0c7acea05580ff44402489b
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 10756 bytes
SHA-256: 2fb3bf6248398566a4c574fcea565c3e7bcad17ea7859a6c9413f397a4de0063

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