Malicious PDF — malware analysis report

Static analysis result for SHA-256 5669675e5aa01c0a…

MALICIOUS

PDF

74.2 KB Created: 2021-01-11 18:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 258344c650edf72e1ae74870b6733937 SHA-1: 41bba3125a453d5dca9a664e9983a8f80db995f6 SHA-256: 5669675e5aa01c0a5dde7039fa47913bea886630fb5265bb316edc54a1ea8703
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded JavaScript and a high number of external links, with one suspicious URL pointing to 'traffine.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://traffine.ru/aws?utm_term=blue+cross+blue+shield+anthem+appeal+form PDF link annotation
    • https://site-1178336.mozfiles.com/files/1178336/fist_of_heroes_zombies_vs_hero_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5fd7e6472314e.pdfIn PDF document text
    • https://site-1217043.mozfiles.com/files/1217043/derailed_movie_streaming.pdfIn PDF document text
    • https://site-1171725.mozfiles.com/files/1171725/paw_patrol_pups_to_the_rescue_free_download.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/fitness_bodybuilding_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_5fb8159c73683.pdfIn PDF document text
    • https://site-1174852.mozfiles.com/files/1174852/update_google_play_games_apk.pdfIn PDF document text
    • https://rakonudiboxenej.weebly.com/uploads/1/3/4/8/134874851/getavo-zigimolipekedo-sobaxatag.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/gurupixabogivaz/internationalization_of_higher_education_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/article_35a_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/55195888096.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/washington_emissions_testing_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/29501596528.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/nodaluduzilutaximiba.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/codycross_answers_group_347.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_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 5584 bytes
SHA-256: 4688aea2e49fa52bb70826a3f52b72c14208bf8b65b2dab233ae9e452b831a57
font_01_sfnt_off0000f805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 10500 bytes
SHA-256: a77288ba3c379cc5a8b8a951919c6f74e10f792b1e94152669040a399b41d1a6

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