Malicious PDF — malware analysis report

Static analysis result for SHA-256 455045f51f2899a1…

MALICIOUS

PDF

71.9 KB Created: 2021-01-29 23:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 160d53a02fae881d51c1955f43f3eda1 SHA-1: b3b34318276d5ef2a65afde01e3e5a2885d8cbdd SHA-256: 455045f51f2899a124aa65056451beb20171ed4d6ddd51953b12fa651456956b
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous external links, with one pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://baarspo.ru/123?utm_term=goat+products+australia
    • http://wdd13.ru/download_world_war_heroes_android_1s1udr.pdf
    • http://icub.tech/jalifetagezepagijug0j6el.pdf
    • http://youla-24.cc/circular_economy_for_productivity_and_sustainability1h807.pdf
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/4816743.pdf
    • http://vatitafi.22web.org/61558552398.pdf
    • http://maslovauto.ru/team_builder_games_online5ilz0.pdf
    • https://static.s123-cdn-static.com/uploads/4493890/normal_60013ee7b53e3.pdf
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5fee96980c9ed.pdf
    • http://wiinorama.space/tabletop_propane_heater_lowesqedhw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xomudufe/can_we_make_android_apps_using_python.pdf
    • https://s3.amazonaws.com/polexebuj/australian_infrastructure_report_card.pdf
    • https://s3.amazonaws.com/najubu/new_bengali_movie_free_mkv.pdf
    • https://s3.amazonaws.com/nakuzafol/taxutuberiwixeson.pdf
    • http://bezopiwuzalobit.rf.gd/79700754341.pdf
    • http://timavutiziv.epizy.com/bland_diet_food_list.pdf
    • https://s3.amazonaws.com/tigewibejageju/44218218073.pdf
    • http://fikuputo.epizy.com/35147280617.pdf
    • https://s3.amazonaws.com/pidufozu/fofaxekonike.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc02.bin
1a7ca6adc4e8109da259f0d9d55b62c15ba5fe6c4e216e7d5768d58dce109c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 5096 bytes
font_01_sfnt_off0000ed67.bin
dc8151dee28e2ead091f02d6a7fbe69438bd39609017c9d49e6a580ce84bb50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED67 11024 bytes

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