Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa14dbcda1951abd…

MALICIOUS

PDF

67.8 KB Created: 2021-03-24 05:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 522b567e153f3a310841ec4e83de263b SHA-1: 9c20db3734d4829fa12ec3f1b45599e80173341a SHA-256: fa14dbcda1951abdff34594860f53b0f558782664e72f7090bbb9534eb3e752c
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, characteristic of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/123?utm_term=marist+college+canberra+uniform+shop+opening+hours PDF link annotation
    • https://cdn.sqhk.co/nadizolobe/RKiiheJ/anime_keyboard_theme_gacha_life.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/4234441.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/ca_final_costing_scanner.pdfIn PDF document text
    • https://nojugebi.weebly.com/uploads/1/3/4/3/134321301/3895436.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/90823.pdfIn PDF document text
    • https://fevegukiso.weebly.com/uploads/1/3/1/4/131482975/jupezapinavopuk.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/bHijhgh/samsung_watch_3_health_features.pdfIn PDF document text
    • https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/xuwamos_puzoradapitub.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/giiaXhg/2504525355.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/bawugikufewal.pdfIn PDF document text
    • http://zesizejo.22web.org/the_sandkings_of_oman.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/Pz7idgg/ajay_atul_new_songs_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dixisafujanen.rf.gd/64317765554.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_f27fd83bd81f45889c80a989d560de29.pdf?index=trueIn PDF document text
    • http://kasazupolixugi.epizy.com/taxopefulomowo.pdfIn PDF document text
    • http://pidivatepijalaw.epizy.com/vuziv.pdfIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_05ac7d2c2ad54574bb9120be27db73e0.pdf?index=trueIn PDF document text
    • http://ribidur.epizy.com/cover_letter_for_job_application_in_bangladesh.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/79593628133.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_98b5f9d47fe04dbaaf2830cab0580fe5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 5572 bytes
SHA-256: 8b052378b9c3a6ecfec19db744df0920c37bc41fba1530cf74f90fcfdaa5dd68
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 10384 bytes
SHA-256: b8b8facb85f55759bac0ac5c54ba26a0c42e28e63f00da24db60f2b147e55c31

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