Malicious PDF — malware analysis report

Static analysis result for SHA-256 886ee63f095b95ce…

MALICIOUS

PDF

77.4 KB Created: 2021-05-19 07:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f4b63d7eef1f5f0f3c99b5a78cf8e46 SHA-1: be1e85b9d836e00e5642c4d08d115388be446eab SHA-256: 886ee63f095b95ce5d123283018b92403dd453a4d234a7f092909b89c2d5b037
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm for SEO manipulation or phishing. The primary external URI, 'https://maypoin.ru/strik', likely leads to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or malware distribution.

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 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://maypoin.ru/strik?utm_term=how+to+clean+brushes+on+hoover+dual+power+carpet+washer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425009/normal_602d9e1ac51a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fc9fbe89897c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474457/normal_601fce4fb386f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fe41391c0e12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcf35a970e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_601ab5f625254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423714/normal_5ff7f6a6afdae.pdfIn PDF document text
    • https://kufifelukabi.weebly.com/uploads/1/3/5/2/135297374/6330841.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/04cf928b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_603e43e97b10a.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/zodedo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd086c166e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5fd3b1c0af7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_6014fbc7ae925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6014f312b1a09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5ffe12c743640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_602575634db16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e3cdb428-d117-40d9-bbe4-ff486ed25e82/varedirusofalomowajit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18652111-dbb9-4f57-b521-628939a490d6/how_to_use_array_command_in_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bde6a5-e910-4d45-a59d-61176e5fe01f/foolproof_module_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d552ce38-7d04-49a4-9b57-da1a627fa110/precalculus_fifth_edition_stewart_redlin_watson.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_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 5248 bytes
SHA-256: bf755f54df18001858f20fda333b46190210e68296a8b2a3edab8c212cdda1a7
font_01_sfnt_off0000f39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 10520 bytes
SHA-256: 0dc6aab4be4cfd56f8780f49948031fc72946c0d80a9a1ab6ef6a31fb581dbe8
font_02_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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