Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0341a4406c08277…

MALICIOUS

PDF

83.3 KB Created: 2021-02-28 00:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 02b672f62711d0436462c707ecb36544 SHA-1: 75c391361a278cdefacaa7e000eff9737a33254a SHA-256: a0341a4406c08277d2ee98fdc20bc4a248133c590d6d87032194f2f0880fb8f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URIs pointing to suspicious domains, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV and an ML classifier also flagged the file as malicious, indicating a phishing or trojanized intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=what+is+pmd+medical+term PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366957/normal_5ffea6148c097.pdfIn PDF document text
    • http://pycnidwzxc.info/vidagifawogafezah4axk.pdfIn PDF document text
    • http://instapriz.website/33470431230zktsb.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/lectura_en_frio_ejemplosa49eq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_601136bf9ee43.pdfIn PDF document text
    • http://meetporte.xyz/bakuzikixavipelozuxarp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5feb35ebdb81b.pdfIn PDF document text
    • http://poopo.ru/2898098128827f11.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/jbE3jeB/giwiluxikela.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/ibjejjW/46734567563.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/dllhjOo/33683655711.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Qjakgiq/music_from_crossing_jordan_tv_show.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/jighe0z/51832491204.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/sib8twR/camera_studio_mod_1._7._10.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/XOyceHM/27027955.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/luramamelolem/sagarulamavibofitogewud.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/bistable_circuit_waveform.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/big_data_platform_engineer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/ragnarok_eternal_love_m_assassin_guide.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

Related samples 3

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_off00010a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 5324 bytes
SHA-256: 3c3a307413307ad760a057560ea7466224ad55ba948dbab85398d13402d2b6e2
font_01_sfnt_off00011c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 10444 bytes
SHA-256: 114c94bc329c9c273fcadd970d0f834dd5906ccf3561aa0c9c6f50cf92d1b780

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