Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f8658cbd5516ea…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 18:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05de9afd940fd0c9cd56b1eabcc15f7f SHA-1: 5ca27a418f3223f43e92335f153329e9041a40c0 SHA-256: 70f8658cbd5516ea5312607f07192f50eda1735e34c3ac3095728976f53eb8d2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=safety+management+system+training+pdf PDF link annotation
    • http://vozobatenaw.mywebcommunity.org/digital_marketing_thesis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd7b5874831e.pdfIn PDF document text
    • http://nutristrike-shop.ru/747959476894ycup.pdfIn PDF document text
    • http://diganez.iblogger.org/training_certificate_template_ppt.pdfIn PDF document text
    • http://xudisoda.66ghz.com/tedelesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_603ea1bbe9b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_604e8fdf93224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_6012dad09a0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_601a553fc50a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_6019cebf937a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_6032bab322e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fe963b1a0789.pdfIn PDF document text
    • http://2220202.ru/mardaani_full_movie_watch_online_hotcv2u0.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/85676821118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5fe591c14fc49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602d6969b2b09.pdfIn PDF document text
    • http://bilkan.fun/66043349575jbiep.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/52824511267.pdfIn PDF document text
    • http://pufavagimijibo.22web.org/82866391351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://latilofu.rf.gd/bekhayali_video_song_female_version.pdfIn PDF document text
    • http://xaxidos.epizy.com/95882885693.pdfIn PDF document text
    • http://tajuxubixasisew.epizy.com/el_libro_zend_avesta.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_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 5532 bytes
SHA-256: 58e3f94cbebebe2be597174db5d5399d6bd4c5b43da37471992c446134acce3a
font_01_sfnt_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 10224 bytes
SHA-256: 6b55776266ad4bda604f24225baab9c704df0ca13a76ed86035242e66b7a9229

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