Malicious PDF — malware analysis report

Static analysis result for SHA-256 912954fd26cfa046…

MALICIOUS

PDF

70.1 KB Created: 2021-04-07 04:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bde0cddd34f1ae7bd04189f5a8138c67 SHA-1: 5b46a28cbe293042de2e95dd58ba84dd163175cd SHA-256: 912954fd26cfa0461bb261f9fff784debd3d27365f44f59ad769e2e89d1580d8
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://crophysi.ru/award?keyword=almanach+des+sorcieres+pdf PDF link annotation
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/cbaea8d75.pdfIn PDF document text
    • http://tokigarodam.22web.org/adlani_rambe_bintang_kehidupan.pdfIn PDF document text
    • https://xisasuwida.weebly.com/uploads/1/3/4/4/134472621/9ec77cebb.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/jefobexapulow/logo_quiz_android_crowd_level_18_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/84745555573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65fb41f-3dac-4115-81de-9fc2eb0171c1/maytag_front_load_washer_door_locked_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b211468d-5a8c-40ca-a4c3-a33c26c83b55/does_walmart_accept_ebt_for_delivery.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/personality_essay_examples_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/basic_computer_mcq_in_gujarati.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_d7d6e438db3a4abfb3651237f975303f.pdf?index=trueIn PDF document text
    • http://xumepamef.rf.gd/vapekewizin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72090f03-24d5-4320-96b6-7a31dde06a58/old_wooden_doll_houses_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf234f9f-659b-4ef8-a745-d49e1e76cf84/v_for_vendetta_comic_vs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/hamilton_beach_22_quart_roaster_oven_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/bafebimuzifikaba.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/3704828936.pdfIn PDF document text
    • http://davafegi.epizy.com/adornos_navideos_manualidades_para_colorear.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/xagofolo.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_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 5384 bytes
SHA-256: 2fbd6083ffcb44395fd48a0704643e26015a82d43a298ca5017c83596801efc5
font_01_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 11468 bytes
SHA-256: 7f5164a646f3bf956e2008f9e780cf243303013f0b26a81115d5a1f57424430a

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