Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda7e4229158df9e…

MALICIOUS

PDF

72.7 KB Created: 2021-05-26 06:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cb59f14ad4ed25b5bdf9fcf6ed08b7f5 SHA-1: 2ccfb843aa686cc5d3f4aee35cf0c8c68b27021c SHA-256: fda7e4229158df9ef6aec889b064a2a006f832d43067558082ca9755d0156d2d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to suspicious domains, likely serving as part of a campaign to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=area+and+volume+of+similar+figures+worksheet PDF link annotation
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/3449306.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/8927789.pdfIn PDF document text
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/9d9674c5.pdfIn PDF document text
    • https://zofodepeva.weebly.com/uploads/1/3/5/3/135318354/pawogagot-saseberudes-lizedipuvulalux.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/sopavolofobu.pdfIn PDF document text
    • https://kazowajobizitat.weebly.com/uploads/1/3/0/7/130775795/b879ec3906b2e0.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/ea402347b08455.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/vososasoxumete/40402051406.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/55387884079.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/90546147391.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/contractions_worksheet_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/fumetabi.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/oecd_green_growth_indicators_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/how_to_clean_a_carburetor_on_a_lawn_mower_without_removing_it.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/line_6_hx_stomp_bass_presets.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/burlington_iowa_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c0b54c-cbc4-4364-ba06-8417e282c55a/baby_girl_christmas_outfit_12-18_months.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/panasonic_aw-_he40_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/vimivuzidujepelomoziguwan.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/wowululirusozasafubade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b993f5f-1aaf-49ef-ae7e-231fe57211a9/leravotabixesiwod.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_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 5528 bytes
SHA-256: 9e8f396fa2e452ee2ed359ce75096d72546d317a506dae7341bd3f3e222d2fc2
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 10896 bytes
SHA-256: 830b61cc2e69d794112abf3c15f987ede6d28200f61f8c121de30c6e2431ba42

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