Malicious PDF — malware analysis report

Static analysis result for SHA-256 98da7419649d629d…

MALICIOUS

PDF

75.2 KB Created: 2021-04-04 22:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b154ad23ca323749174827edb8ae7c81 SHA-1: ce00d31bd92967dd56ba8cdac65c0bd04a6568c7 SHA-256: 98da7419649d629dc04d847f66f00bfdbc4f02110f4377d2485f9db8bc2cb680
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF phishing trojan. The PDF contains a large number of external links, indicating a potential link farm or phishing attempt. While no scripts were directly extracted, the presence of external URLs suggests a mechanism for delivering further malicious content or redirecting users to phishing sites.

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://ponafet.ru/strik?utm_term=top+business+analytics+programs+in+india
    • http://jivusibofonefud.mygamesonline.org/guwowawi.pdf
    • https://cdn.sqhk.co/rorajakura/hiMfidc/limbo_song_lyrics_in_english.pdf
    • https://larulesa.weebly.com/uploads/1/3/4/7/134717423/medemato.pdf
    • https://mekowoto.weebly.com/uploads/1/3/0/7/130738632/6c8a8.pdf
    • https://cdn.sqhk.co/povewepalu/FlCjaha/dinosexomiriza.pdf
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/66028266a89f034.pdf
    • https://teleroxekafi.weebly.com/uploads/1/3/5/3/135321942/5583269.pdf
    • http://bebalezuve.medianewsonline.com/anemia_y_tipos_de_anemia.pdf
    • https://cdn.sqhk.co/develezuwa/Jib4jbL/bingo_wings_before_and_after.pdf
    • https://nefixesuxu.weebly.com/uploads/1/3/0/9/130969456/geketoredoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://milebulijulami.onlinewebshop.net/nicomachean_ethics_free.pdf
    • https://s3.amazonaws.com/xewamejixolefaj/kaththi_tamil_movie_songs_video.pdf
    • https://s3.amazonaws.com/supefujoxopubu/attestation_ple_emploi_particulier_employeur.pdf
    • https://s3.amazonaws.com/rixevozajixezos/listening_skills_worksheets_ks1.pdf
    • https://s3.amazonaws.com/xuzed/little_fires_everywhere_trailer_espaol.pdf
    • https://s3.amazonaws.com/farefasejikap/what_does_legal_term_stayed_mean.pdf
    • https://s3.amazonaws.com/mubemutolewe/common_oral_interview_questions_and_their_answers.pdf
    • https://s3.amazonaws.com/ginutu/gaxoloze.pdf
    • https://s3.amazonaws.com/wolina/internal_combustion_engine_efficiency_calculation.pdf
    • https://s3.amazonaws.com/fukezavazuj/55049213322.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_off0000e866.bin
2afb2819e34a84165efede4b783b3b4ab62c883de48d1558a85d81cf99e88266		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 5584 bytes
font_01_sfnt_off0000fb49.bin
e54a29bbb7bf67b68a2df5116f36fd6adac97fc078d928a152c7aaba5f382288		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 10692 bytes

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