Malicious PDF — malware analysis report

Static analysis result for SHA-256 30039d7d34f4e301…

MALICIOUS

PDF

104.2 KB Created: 2021-05-19 11:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1b8438760ec81819f16e25746cade955 SHA-1: 52158a34551348703a0f135dc258f3178c54531d SHA-256: 30039d7d34f4e301083cb9da93979e1137cde5d8e614add8849bd806278aa805
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous external URLs that direct users to various websites, including potentially malicious ones like 'seumenha.ru'. The document's structure and the presence of many external links suggest an attempt to manipulate search engine results or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://seumenha.ru/strik?utm_term=bonnie+and+clyde+mp3+download+juice+wrld PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490934/normal_604ca2fd5aa8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_603b0d2174ff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5fd397db643ec.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/jexigividonoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_6019c9adb9d00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_6006ad7ef3299.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/zajapusarakixa.pdfIn PDF document text
    • https://kexibisurek.weebly.com/uploads/1/3/4/3/134334279/1435877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_606c7cf61360b.pdfIn PDF document text
    • https://vulelarebu.weebly.com/uploads/1/3/4/9/134900748/1473291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_604ccf478d529.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/9dfc8695d6d2936.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/tuluzob.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/9be4692283e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_6040ff596d5c6.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/1649b7b4-5926-43f2-860c-48f40b0fdbb0/21511228945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26fb03ef-f0d9-4654-831d-9264960d6093/how_much_does_a_polaris_1000_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928527ae-0395-44a3-961f-492c056a2900/how_to_make_a_pop_up_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fde1cc3-5416-4da7-9d17-89a2fa4ce690/halliday_resnick_walker_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78a41ff-8b99-46bc-93ee-341800dc027a/teclado_casio_wk_3000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded132bf-2867-45e4-8e4e-4107789f1f67/67190750615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f3bbc4-54b2-4798-afb8-2dac44c9383e/gadevarawari.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00012416.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12416 3628 bytes
SHA-256: e30ce4111754fb37ad9de03157b6225096fa04e90a2cfd53374a72828385b914
font_01_sfnt_off0001311e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311E 5524 bytes
SHA-256: 9fc04b4a9b17fd3f1a3dfc57507fde7caa7efc75cab686579defa54fba7aa623
font_02_sfnt_off000143e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E6 2112 bytes
SHA-256: a7c247810999ffa34601d97f642fb585cf41ae12aef679f1f6249880f1bea8f5
font_03_sfnt_off00014dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCD 14408 bytes
SHA-256: 09c6b52a5be51297612da32eb8eb5666f1d2b649bfe7fa14b400aa21f5065c47
font_04_sfnt_off00017b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B44 16680 bytes
SHA-256: 434bb176a19debd3f939feacf6f236e222855d1579d446da49c319ba6b21f7e5

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