Malicious PDF — malware analysis report

Static analysis result for SHA-256 454dcec0dc5afb18…

MALICIOUS

PDF

80.4 KB Created: 2021-03-31 23:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ecfe3504917f4c1a360d793b8c2d6e20 SHA-1: 5ef5a55f3f3240fc25c7c159003b04ed24c252f2 SHA-256: 454dcec0dc5afb18a008ffea4a5af363698257a06eb486d805ccb2256f17a0a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, suggesting a link farm designed to drive traffic or host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=energy+transfer+in+ecosystems+worksheet PDF link annotation
    • https://cdn.sqhk.co/luwibajik/idogf2r/38970138445.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/zokinedaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/cEgfji1/messenger_download_apk_for_pc.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/bc6ddf18957c1.pdfIn PDF document text
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/d7f20.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/3782826.pdfIn PDF document text
    • https://cdn.sqhk.co/jigijobofofa/iemhaH4/54995896325.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/jenafusofobi_bifun_zalibefas.pdfIn PDF document text
    • https://nazewaraja.weebly.com/uploads/1/3/5/9/135959380/radimoramimelo_razadufi_porowugijajuner_dukuturukoti.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/8014e52.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/Dyjejdx/19494764707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugidujesu.epizy.com/facebook_app_events_android.pdfIn PDF document text
    • http://lebiwubeso.rf.gd/94814601581.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/free_avery_8160_template_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/jeniwugotubofogumeg.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/kotor_manaan_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/xuneguxod.pdfIn PDF document text
    • http://gosigugul.epizy.com/english_grammar_exercises_for_class_6.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/data_analysis_with_python_github.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 5476 bytes
SHA-256: 0dbddfcf56a3355f195005e34a6e13b1dfec3260cb0376ffdfb8c0863ad49e1e
font_01_sfnt_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 11224 bytes
SHA-256: f7a4d6ce53f3a5b276dbf2cb757f331013cd5653c5b4814149157c545afd7465
font_02_sfnt_off00011dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCD 16352 bytes
SHA-256: 854d8403a205ca227da7b683cb45c4b718af2b515732bc8c61da881ef3bf7b32

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