Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5771f50cbef07e…

MALICIOUS

PDF

70.2 KB Created: 2020-11-27 10:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 64ca270267f1540e2b88225d7b37e2f1 SHA-1: db46c2e2567eb8c399e299795370d79db8039a6e SHA-256: fe5771f50cbef07ea6d0dbf809e8a033d3ad53ad761b2b2632a1af62d1c5f587
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=reception+phonics+worksheets+pdf PDF link annotation
    • https://vifefafu.weebly.com/uploads/1/3/4/8/134876142/kilixap_melemubivuka_fajeditolol_kalogane.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/pewebopufupe/60741486586.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/xuromitifewaji.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/joining_the_conversation_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/minowimexofogitaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/romoruguxilonatavoru.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/sixegotidanilupuvog.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/briggs_stratton_repair_manual_270962.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/pedikavapitexozeruvubes.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/adobe_illustrator_rope_brush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1febf7-1534-441f-83bf-c90ca1b495eb/49352318919.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/empirical_rule_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/box_whisker_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73115228-a862-4f4c-b1b8-41444ffdf089/valuation_points_aligns_ce1.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/27012307183.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_off0000d6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E8 5164 bytes
SHA-256: d6591475c16166289e5b02752fac4069e9f70dada04da084cf03215bdd723e57
font_01_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 10316 bytes
SHA-256: 1f0c3d0643dd449af6afce1cf6b1560a2e51e2aa142b396871a23c8e712e6391

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