Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cee690d1a44ab1…

MALICIOUS

PDF

76.8 KB Created: 2021-05-22 14:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f04ecba3527c79a81827a7d31663cbb SHA-1: f5e40a2abf77db278e9731a4514593e094600d5d SHA-256: 83cee690d1a44ab1ee339fb83a34517372b53d04c50734ef84ec5cb6d406b1b7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.6798

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.
  • 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
  • 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://resalured.ru/strik?utm_term=homojen+heterojen+kar%25C4%25B1%25C5%259F%25C4%25B1m+%25C3%25B6rnekleri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374188/normal_6066a3aad0e2c.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/8ba0aa7c17f6a.pdfIn PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/4c0ea7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_603f3ff6171e4.pdfIn PDF document text
    • https://rilulozopofebu.weebly.com/uploads/1/3/1/4/131406258/7331511.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/5630194.pdfIn PDF document text
    • https://dawifebenunu.weebly.com/uploads/1/3/4/3/134374742/vopikaloluruseb_bajonom_zunigefenos.pdfIn PDF document text
    • https://dufinatako.weebly.com/uploads/1/3/4/3/134317719/5996588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5fea18ae9d7cb.pdfIn PDF document text
    • https://migikinuxufik.weebly.com/uploads/1/3/4/6/134608510/7a8d867.pdfIn PDF document text
    • https://divigutokorafo.weebly.com/uploads/1/3/4/6/134683056/xagagutox_lepinebugit_piwozanusidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fd1d38d2d05c.pdfIn PDF document text
    • https://pafudufuwod.weebly.com/uploads/1/3/4/3/134326080/7334609.pdfIn PDF document text
    • https://nirotobilimob.weebly.com/uploads/1/3/4/4/134484477/3401849.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/seriposuj/newololunavisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a42ade-52be-4d24-915b-6b19179cd15a/coping_cat_ages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51d6e3f-8acc-482e-b676-63533f780fa1/29478490750.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/asos_formal_black_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/maytag_neptune_washer_problems_loud_spin_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4fc261-9f69-4931-b317-3566450328df/honda_rancher_es_manual_shifter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8684ac-d49b-432b-a1a1-7774547af0fb/74183227972.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/how_can_companies_create_shared_value.pdfIn 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_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 1684 bytes
SHA-256: 8b69ad8bf8706a8de8604f0485c67fb25a23b24d50174afbb8bbf061f3c53837
font_01_sfnt_off00010115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10115 5268 bytes
SHA-256: d1d2a02240918f6ceef91a982e7a4ed5f8da865f99c69b71f5569e3038dee540
font_02_sfnt_off00011292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11292 12848 bytes
SHA-256: 55f150b6475af1f3268b734a453266072f69513c10862e87edb95e4b490f4bb8

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