Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8059adbe7fc04c…

MALICIOUS

PDF

112.3 KB Created: 2021-03-28 09:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dd40bc3b32e48b5e427f4b6647cbf19a SHA-1: 28e881b95ea0569de476fdaad8883e14588706cd SHA-256: cd8059adbe7fc04ce8ed6687071608fc0bee3aeb52c866e4cc56add12153a061
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 0.9998

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 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://ponafet.ru/wix?keyword=sand+village+ninja+naruto PDF link annotation
    • https://koreluluzoma.weebly.com/uploads/1/3/5/9/135972167/9363840.pdfIn PDF document text
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/paviwafakawasa_ledipugaxim_rekos.pdfIn PDF document text
    • http://spencermcman.us/wiwexeziguvi9vt3k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff1e8d0d9167.pdfIn PDF document text
    • http://spain50off.info/reperupegemitofovaxateww3zrv.pdfIn PDF document text
    • http://mainsale.info/grohe_kitchen_faucet_aerator_toolswsp4.pdfIn PDF document text
    • http://igme.site/4258676911689npr.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/cc4d8afe49f.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/welding_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475725/normal_602c71597665c.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/jorge_luis_borges_borges_y_yo.pdfIn PDF document text
    • https://velelamoju.weebly.com/uploads/1/3/1/4/131438442/bisolozoxugof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_602c3b80c7960.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/93685367658.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/e4f51af1-d32b-4714-9a9c-fe8042ff002b/zosemarunexasosif.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/41862675506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7d3d16-bed4-48ca-9801-21909a55a3cb/togapevajafijotaxudedajuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcad2bf-7482-400b-993c-fc8cb96d38fc/reaccion_de_combustion_del_metano_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d93fd1-217a-4cc2-bbe4-45490ea86a7d/37481302053.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_off000122ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EF 27936 bytes
SHA-256: 883b40273815ed3cbfa763681dcfeefd9f46071fa8fe4c93992a850e23b9b660
font_01_sfnt_off00017b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B0E 5052 bytes
SHA-256: f6ec852c4d0ac25db341875656e84b7edcc277f5143f3211c80ca20a2dac4727
font_02_sfnt_off00018c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C52 11408 bytes
SHA-256: ffe0b301b6b53f1e1ab16ee074aba529627ea5b5bc185be6df089f62cd68418f

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