Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c977877307e6ca…

MALICIOUS

PDF

88.0 KB Created: 2021-05-23 09:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78465669a8ea603b8a3ff2bce527bb55 SHA-1: 5977a9dc79afb774100fc360bb89b3e69cc560fd SHA-256: e6c977877307e6caa9924b259be7a589ef48491301c94ec6a9d45024fc9d0799
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though obfuscated, appears to be a lure related to professional ethics, likely intended to trick users into clicking on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=codigo+de+etica+profesional+de+un+criminologo
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/mozunatuvoxe.pdf
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/jaras-zowupumoreza-gesiladufasura.pdf
    • https://cdn-cms.f-static.net/uploads/4416790/normal_6010096be2f86.pdf
    • https://zanikegira.weebly.com/uploads/1/3/1/4/131437850/julikafemada.pdf
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/xafowupikabituv.pdf
    • https://cdn-cms.f-static.net/uploads/4408184/normal_6030e82d6acea.pdf
    • https://warujupegam.weebly.com/uploads/1/3/4/6/134687544/diwazivatoviru-jejovofekem-xenam.pdf
    • https://sutukedepebovi.weebly.com/uploads/1/3/4/7/134753024/kovevojevekema.pdf
    • https://cdn-cms.f-static.net/uploads/4446489/normal_602590f54d491.pdf
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/vewipobolokotu.pdf
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/xajobamif.pdf
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fe531b116086.pdf
    • https://lawebigatu.weebly.com/uploads/1/3/1/4/131453175/4900159.pdf
    • https://static.s123-cdn-static.com/uploads/4407793/normal_5fff310c9eac4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxime/xijopozatixusovi.pdf
    • https://uploads.strikinglycdn.com/files/415b5c2e-c131-4b64-9d29-4559aa808b89/arduino_for_beginners_ebook.pdf
    • https://uploads.strikinglycdn.com/files/0f675007-a24c-4181-924e-7dcdfa739a91/vubuvesexasomaliponafi.pdf
    • https://uploads.strikinglycdn.com/files/5f40db75-4a03-4b18-b293-41e4090ebaea/ligukeb.pdf
    • https://s3.amazonaws.com/rebomedug/beginning_sounds_worksheets_preschool.pdf
    • https://uploads.strikinglycdn.com/files/1ed2d230-78c6-459b-86e2-cdf20b08af82/toro_gas_trimmer_carb.pdf
    • https://uploads.strikinglycdn.com/files/11cd4487-c5b5-4b79-a05a-d14d7db98b71/cessna_210_maintenance_cost.pdf
    • https://uploads.strikinglycdn.com/files/d4ff6bbd-1d21-4319-93cd-49a1b2ea98d4/clasificacion_de_las_cuentas_por_cobrar_segun_niif.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_off00011592.bin
7d9669dbf1a51d5f1f91d9460ab1781d6eb52dd854b8a97d76875114dad531dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11592 5380 bytes
font_01_sfnt_off000127ca.bin
002152132b7767685de5b44ec0216e45eb2ea1a369227b5414321c6248b1ea0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127CA 12812 bytes

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