Malicious PDF — malware analysis report

Static analysis result for SHA-256 682d7110c8688edf…

MALICIOUS

PDF

95.8 KB Created: 2021-04-03 05:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ec54f117025c6424a3cd325a329563e9 SHA-1: 52aa0f19c59b009b1b7d5c1e69175366bb87081a SHA-256: 682d7110c8688edfb1e8e9da22c333c28ff1dc734ad75a5e9ec5bf80c5873b4e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=librecad+3d+render PDF link annotation
    • https://cdn.sqhk.co/sixepatexup/hal70gj/28679809940.pdfIn PDF document text
    • https://retuxuzuj.weebly.com/uploads/1/3/4/6/134688644/panureg_palituw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fff2e9a0d20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_603a8ca17af0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_6036b23b820b7.pdfIn PDF document text
    • https://tumavogadagakep.weebly.com/uploads/1/3/4/7/134721967/jafimanotu.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/jgeQgcI/official_table_tennis_rules_singles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_5fee29611babb.pdfIn PDF document text
    • https://wibujiwegawej.weebly.com/uploads/1/3/4/8/134899761/jokapoma_defezakara.pdfIn PDF document text
    • http://wukosemat.22web.org/chapter_33_the_great_depression_and_the_new_deal_quizlet.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/ea9a9d8a-8dce-4036-96ec-cc00e792446e/wozolonejibiroxewidibeko.pdfIn PDF document text
    • http://takugiwem.rf.gd/animal_kaiser_game_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a26691-f124-4731-b326-fc3552d32c65/likirimanejuvizuzutuwub.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_4f3c660672a341f6a709f97500129a8d.pdf?index=trueIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_5cafb66df930405da7753f0aeb9be0ea.pdf?index=trueIn PDF document text
    • http://supetok.rf.gd/66827898434.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_d60a743076794003af13c0d460528f86.pdf?index=trueIn PDF document text
    • http://xafofeb.epizy.com/18855724793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc154e4-2184-45e9-b81d-db37b5adc316/delorme_inreach_explorer_two_way_satellite_communicator.pdfIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_d31fd8d6e0fd471f9f43b4816687b3ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2938ed01-44f6-4351-94af-0d9da6e693f5/rezemamonibigesej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 19512 bytes
SHA-256: 28155a1dcaf2d7caf369da4732887c076e87bde087fda60fac893c361770a1a6
font_01_sfnt_off00013a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0B 4968 bytes
SHA-256: 80ba7fe87a7cc408987a13766fe4988c209f1eddf1cb7e3c3814fbe2e5e0fbac
font_02_sfnt_off00014aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFF 12276 bytes
SHA-256: b93314fa65407e300d50252cfc0eb8b8c77635ebbc5dd2b7c58ede53048ce641

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