Malicious PDF — malware analysis report

Static analysis result for SHA-256 e778af4342e1e02a…

MALICIOUS

PDF

78.5 KB Created: 2021-02-15 10:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7edbaf3a957a22e2528c2853a9232c0e SHA-1: bd450dedaca1cb92f294751e1bc36a7d925f7e29 SHA-256: e778af4342e1e02a3b0e9056a6612d59e9999ea979a2ae7621fa79c3f840da63
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'bologen.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Artemis fowl the time paradox', suggesting a phishing or social engineering attempt to drive traffic to malicious sites.

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://bologen.ru/strik?utm_term=artemis+fowl+the+time+paradox+read+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fe7f44c62daa.pdfIn PDF document text
    • http://remontvorot24.com/92523177381htnku.pdfIn PDF document text
    • https://jirugewozori.weebly.com/uploads/1/3/4/8/134898712/vujom.pdfIn PDF document text
    • https://dobuxodujunov.weebly.com/uploads/1/3/2/7/132741154/8799314.pdfIn PDF document text
    • http://ellmax-site.xyz/8316551918fl6gz.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/91GgjIP/39205626608.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/simes-nidazede-goloredisawib.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/Shbeahj/spinner_io_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/ixCtjiE/beat_racer_hack_mod_apk.pdfIn PDF document text
    • http://sehq.xyz/about_last_night_imdb_parents_guide3xy7e.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/lineages_of_the_absolutist_state.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5febc39fba544.pdfIn PDF document text
    • http://itasda.online/30293544923iehy0.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/tozaduliwubega/64498027612.pdfIn PDF document text
    • http://lesexuxu.rf.gd/biblia_takatifu_ya_kiswahili_free.pdfIn PDF document text
    • http://kanisal.epizy.com/hordeolum_treatment_guideline.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_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 5428 bytes
SHA-256: b30b8eb86142ae509a6f5f1b5c4af38f827f5a62053c7b536985bca73b8a550e
font_01_sfnt_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 10508 bytes
SHA-256: 84b436df58f59d11bc3d4a5b061f0778f229be575adb204c78b2009516cba553

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