Malicious PDF — malware analysis report

Static analysis result for SHA-256 796ca438df5126fe…

MALICIOUS

PDF

91.6 KB Created: 2021-04-28 13:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6891724b826115e46dcec3af3e8ac4bb SHA-1: d1bbc4f823906a703da57eb7c6cb6bf083eba971 SHA-256: 796ca438df5126fe39f08b658c53264bfef091d0dd6392b78117882035cbf347
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary focus on directing users to 'zajinet.ru/strik', suggesting a phishing lure or a redirect to a malicious site. The document's structure and the presence of many links point towards a link farm or spamming technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=parallel+parking+laws+texas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455883/normal_5fec226d549dc.pdfIn PDF document text
    • http://gakivako.iblogger.org/bsplayer_1._31._196_apk.pdfIn PDF document text
    • http://whysmall.space/sparknotes_much_ado_about_nothing_act_5_scene_21hm3c.pdfIn PDF document text
    • http://persequen.com/nikejitekikgnuic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_6002f733acc3b.pdfIn PDF document text
    • http://masterpowerpoint.com/rainbow_snake_found_in_florida1g2ih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455659/normal_5fc9f8d36286c.pdfIn PDF document text
    • http://confirmationhelpcenter.com/parabody_350_home_gym5eayn.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://autobaff.xyz/47528855899q1vgv.pdfIn PDF document text
    • http://afracheat2.xyz/amadeus_manuelgi9ej.pdfIn PDF document text
    • http://logvoz.ru/kilazerovarifuritolol8vsnk.pdfIn PDF document text
    • http://japadalifu.22web.org/netelapofegil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_74ea691b42e44f1dac0d5da9d137daba.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_436f78e38bd146de8f6e47f701bf05d4.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_32be57ae0f3741cea083f7f870bd0c00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/todipifed.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/22041934739.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/ashes_of_love_novel.pdfIn PDF document text
    • http://gurunetotej.rf.gd/bumiduf.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/koxabulewopovu.pdfIn PDF document text
    • http://bivuraxut.rf.gd/spring_time_yiruma_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/best_detox_cleanse_whole_foods.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 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_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 5212 bytes
SHA-256: d7bbd7cee8647242203e1b5617e10d6c7cfd77ffb1d5159710a3fc7f8ac03faa
font_01_sfnt_off0001394d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394D 11552 bytes
SHA-256: 23d1e7b1ff5194a8ac6cbc7d5d06513fb9bd013c17425e867da7a3ec55f04a66

Open this report in the interactive analyzer, or submit your own file for analysis.