Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab67e2fcccc01e2…

MALICIOUS

PDF

70.0 KB Created: 2021-03-06 09:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 43cb8e0915edc33aa84be1b126275aa7 SHA-1: 20aba22cd53b7991ee7fa296dfc6e840e4fc7bac SHA-256: fab67e2fcccc01e2f9665dc9191f8e9ff812c57a8ba200b6bb5f5befae03ec17
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to distribute malicious content. The presence of a link to 'midufefew.ru' with a query parameter suggesting a software download lure, combined with ClamAV and ML detections, strongly indicates a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=microsoft+office+2013+free+download+softonic PDF link annotation
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/manofela.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/rudisata.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/wilewixaxupiju.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/rurovikejigibu/dapute.pdfIn PDF document text
    • http://lilepav.rf.gd/function_notation_algebra_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/brooklyn_bedding_sheets_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/powubira.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_9e7e72380fd940b68941ae3488c2f662.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_1dcdffc818f54ba1822524f777f92df8.pdf?index=trueIn PDF document text
    • http://palomidifigur.epizy.com/jvc_hard_disk_camcorder_everio_20gb_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/lg_60uf7700_main_board.pdfIn PDF document text
    • https://e4b2da9c-e15f-497e-b9c0-82d2ee94f50b.filesusr.com/ugd/be19e1_4ed5d447a60b438f83ffa47ea1baa9de.pdf?index=trueIn PDF document text
    • http://jofesowevelen.epizy.com/77339320444.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/lafofezov.pdfIn PDF document text
    • http://sugexure.rf.gd/86604084199.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/nukeguxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/gladiator_asterix_bengali.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/are_there_any_recalls_on_2017_hyundai_sonata.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_5026ba7877354e55aa0c01bfa18d1e89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/97713736019.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_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 5604 bytes
SHA-256: 6f00c47f549b382860b96234dfc4ec4571e68bc3458c5ec1db314831256f63b6
font_01_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 10632 bytes
SHA-256: ca6b4056c4b7325b8257420f26d93064c2e6fdcb72de051edd464a89263526f4

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