Malicious PDF — malware analysis report

Static analysis result for SHA-256 519f4012c5bc00be…

MALICIOUS

PDF

97.3 KB Created: 2021-03-22 03:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6410b5729c72faffe3e3ad9893be8937 SHA-1: 1244e144b69beeb75caec523fe7a467d7a58cc05 SHA-256: 519f4012c5bc00be5d19e1e238e753e621263f19e7efdec48ccadffecc4aabfb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The PDF contains a large number of external links, many of which point to unrelated content, suggesting a link farm or SEO poisoning tactic. One of the embedded URLs, 'https://druttle.ru/wix?keyword=volkswagen+gran+turismo', appears to be a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://druttle.ru/wix?keyword=volkswagen+gran+turismo
    • http://butalinonoruma.scienceontheweb.net/coldplay_the_scientist_lyrics.pdf
    • https://cdn-cms.f-static.net/uploads/4497697/normal_600a447c7529b.pdf
    • http://poguzozod.sportsontheweb.net/pdf_to_word_converter_arabic_support_online.pdf
    • http://lorakuze.sportsontheweb.net/us_billionaires_got_richer_during_pandemic.pdf
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/1535975.pdf
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/b6c116bbabb0.pdf
    • http://zowogusatutojus.mywebcommunity.org/numerologia_biblica_significado_de_los_numeros.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_603cf45c842ff.pdf
    • http://azalea.store/868269562993wzjx.pdf
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/dovabetivotogidujap.pdf
    • http://galabogenezoso.getenjoyment.net/restore_craftsman_19.2_volt_battery.pdf
    • http://ludshop.xyz/how_to_get_arborist_license_in_louisianad9s6f.pdf
    • https://cdn-cms.f-static.net/uploads/4485301/normal_600a25fbb7973.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jabejanaboz.atwebpages.com/1335101411.pdf
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_077092aa37eb4a51907183e68b47c48b.pdf?index=true
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_24a470f836ae4a55b7686d383662db06.pdf?index=true
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_4a45533a58614201a86eb79b88943603.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fdd.bin
87a339431b0ea490ca6eb03f9da037cb088bbc7358161ae3059ecb117b3b949e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 8276 bytes
font_01_sfnt_off00013b8c.bin
309260310dc0cc03a7c4d9173709a83d9ef07521372bfc4e9bbaaf6428753679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8C 5128 bytes
font_02_sfnt_off00014cfb.bin
61612cca24eed1bfe71ba6ce1b0c460e7ea610bcdda812f699d01d4bf9d211e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFB 12812 bytes

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