Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8f5e9c89c050ad…

MALICIOUS

PDF

67.8 KB Created: 2021-03-03 01:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f60ee66ec3c0f16315cd059b2ed8f725 SHA-1: 1dce445f9b844fe7aef3c15227fbbfc813e951e8 SHA-256: ea8f5e9c89c050ad6aeea344f9a42b615cc73312fe2427fa85cddfb509875ecb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, potentially leveraging PDF vulnerabilities or social engineering.

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://soxebez.ru/wix?keyword=hitachi+c10rj+soft+start+module PDF link annotation
    • https://bevarepovorumi.weebly.com/uploads/1/3/2/3/132303359/5939886.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/Y60gNgc/breeding_guide_dragon_city_calculator.pdfIn PDF document text
    • https://kikobuvikivevir.weebly.com/uploads/1/3/1/4/131437815/9961692.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/jaJhbhi/free_spring_wallpaper_for_iphone_8.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/sumamisimugeberura.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/jiLhejf/brain_crack_level_97_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/oHjdyii/zedozijilosifelisevatuze.pdfIn PDF document text
    • https://ketizinuxemuwiw.weebly.com/uploads/1/3/0/9/130969628/kupabapobirutopoxuri.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/4954545.pdfIn PDF document text
    • https://cdn.sqhk.co/xepiriza/mhgjCjf/niwadana.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/gOGC7jg/los_picapiedras_traducir_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/RTlvcij/strawberry_cake_recipe_with_fresh_strawberries_from_scratch.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/dapiruvomuvov.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/bibejovixapis/bible_genesis_to_revelation.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/19140285451.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/12942666877.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/antenatal_care_nice_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/how_to_make_toshiba_dvd_player_region_free.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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 5492 bytes
SHA-256: d3a3cd53b836d783806ce2dd4576a7fdc096917176e595773e7f8e9cb83dc4d0
font_01_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 9536 bytes
SHA-256: 2c558485566c1c8e9f6fc5d9814084be489a7fdcc6f2947066ed1b533fefc15c

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