Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a64e3fc73f0ab4…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 05:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 330391f55942ddfdc3d9615d3e1cea56 SHA-1: bacb8fe30b9db223dfa53511d0f0855121042b96 SHA-256: e4a64e3fc73f0ab4ed84407a31f841c3aea9a5d46e06bf29f4dd0451b27c4b7e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection for phishing and trojan activity. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though obfuscated, appears to be a lure related to 'simple present affirmative form pdf', likely intended to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/123?utm_term=simple+present+affirmative+form+pdf
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/femakajetidejota.pdf
    • http://neletaparufo.scienceontheweb.net/54348580258.pdf
    • http://vamoktin.ru/52854245245gvr39.pdf
    • http://uscarinsurance.info/99125749986rggou.pdf
    • http://carishr.com/oklahoma_natural_gas_pay_by_phone46rvv.pdf
    • http://fovikoxesaweziz.medianewsonline.com/jatipobawijo.pdf
    • https://cdn-cms.f-static.net/uploads/4448986/normal_6055205e76dac.pdf
    • http://shoop-fm.ru/52876409133h0548.pdf
    • https://kopikemuv.weebly.com/uploads/1/3/0/7/130740389/tuzivorosi.pdf
    • http://vashastrahovka24.ru/pojuzimuzevijazebepuxedo4c7rl.pdf
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/cea8b08b.pdf
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/sasefobenudutonixal.pdf
    • https://static.s123-cdn-static.com/uploads/4416506/normal_5fe3bcf8bc6c3.pdf
    • https://cdn-cms.f-static.net/uploads/4443619/normal_603f866de928a.pdf
    • http://ductsunlimitedins.com/wipefogurilabaw4hq2.pdf
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5fdafa085e93f.pdf
    • http://help-feedback-amzn8.xyz/how_to_prove_parental_alienation_to_a_judgei0jed.pdf
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/e5ac3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kegunujav.epizy.com/besizuwoji.pdf
    • http://toxukanubevaga.rf.gd/29843039913.pdf
    • http://robegataparusur.epizy.com/how_to_own_a_computer_repair_business.pdf
    • http://rokipegokibaf.rf.gd/95671910690.pdf
    • http://bokepomi.onlinewebshop.net/sakolimedewofe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a2.bin
9c304e54d8831b04ca71c63585920a00831527500cfd7d9b81a6938ff4dcc466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 5348 bytes
font_01_sfnt_off0000fbbc.bin
9a9e45ebdd74790152479fc53a92942b11fc5eae3336df3a5c4ba40dc3c1a2a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 11464 bytes
font_02_sfnt_off000122f0.bin
61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F0 16096 bytes

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