Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7256e07ad52808…

MALICIOUS

PDF

59.8 KB Created: 2020-12-16 14:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 96081b87cd807bcd70b02c8fa688cd93 SHA-1: b44df8e298c69f365f74d347bb247fee7fb1c953 SHA-256: 2e7256e07ad52808fda70b65002c26450a1e42d6565e16726c6e89fddc150bbb
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. This suggests an attempt to create a link farm for SEO manipulation or to distribute malicious content. ClamAV and ML classifiers also flagged the file as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?utm_term=itc+bodoni+72+font+free PDF link annotation
    • https://radugimexeb.weebly.com/uploads/1/3/4/8/134880062/d113b525a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/440a7200-5656-45a8-b4aa-8b1dc6ffd682/para_que_se_usa_las_comillas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70ec7a4d75e5252f2a30b/t/5fd1a594d97b572b89d72f73/1607574932582/music_player_for_android_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d031084698658e80009c/t/5fc7a9d84f9413233b290051/1606920665867/78544213149.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/metro_exodus_pc_performance_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa60e6d49a06bb5714bb/1606285921388/rupukol.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/42442104772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628d70e0-5173-4d2d-aeae-303a8920f5cd/61534088353.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38e39104edf1d7791b9fc/t/5fc43750bc819f1cf45e5e88/1606694736556/go_tell_aunt_rhody_re7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460152cf-cb39-4259-89bd-f04eb888198b/life_the_science_of_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/pexapijiwifapilo.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/bible_quiz_ephesians_malayalam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec2512a3d2561f5f73f61/t/5fd72510313c42342ba65c9c/1607935250106/fovajojorimisufesipes.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_off0000ad09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD09 4884 bytes
SHA-256: 5bf4df21a8704b88628faffe5003633c161f6722cc0b2c5d00aae435c5eaab8a
font_01_sfnt_off0000bdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC4 10856 bytes
SHA-256: 44fceba9fde9c3e737d66b483bc2cd0dbc50174de53f86588e87d7b8728cd8da

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