Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f44c19c6ddb9290…

MALICIOUS

PDF

83.9 KB Created: 2021-05-09 08:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6cfc64a78c9d0838e12e447433155e29 SHA-1: 7294d1ecef8a1f9ff00f98d2ee2178123908770f SHA-256: 6f44c19c6ddb929026b21be1524eaa47867af4b5a8858b4c9554ad78e0a2a77e
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://leonvi.ru/strik?utm_term=brother+cs6000i+sewing+machine+manual PDF link annotation
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/mukonumuvig.pdfIn PDF document text
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/3104354.pdfIn PDF document text
    • http://nuverlites.online/principales_funciones_de_gerente_de_recursos_humanosa507v.pdfIn PDF document text
    • http://lassituda.online/wowhead_warlock_guideinog4.pdfIn PDF document text
    • http://arenaprobet.com/albatross_2011_full_movief4pan.pdfIn PDF document text
    • https://miwunukeje.weebly.com/uploads/1/3/4/5/134524605/xabuserireli_tuzogebagomo_rudarepexulav.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/4329893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepesupilet.epizy.com/how_to_put_stickers_on_bottles.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/58863974361.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/star_wars_galaxy_of_heroes_cheats_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/83987412084.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/lazixefof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4239161-e277-4728-9cb1-03abc32c2cd3/43669901178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212acb37-9646-4396-8e90-4033c29620aa/set_up_a_living_trust_without_a_lawyer.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/jotadadolitotetimuvobanag.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/78853251099.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/10th_class_result_2018_faisalabad_board.pdfIn PDF document text
    • http://xowofalofuzuxis.epizy.com/80341707349.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_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 5648 bytes
SHA-256: dc58c0a32285ed0d49c52997776a3d0c8b82a5359149b08adcaac40e0e8a5102
font_01_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 10796 bytes
SHA-256: 4edb71273b50d7983308ae399973f4142739ab61c2715e5658128f24d5657e35

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