Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9217b51459fd147…

MALICIOUS

PDF

91.7 KB Created: 2021-03-14 14:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0700b0916b016afe135b199888aacef3 SHA-1: 71d12d5f295e14e66e6b76eb36eb4b89d97b9945 SHA-256: d9217b51459fd14774f48ce261ec926360bc9083ed843cbea1dfaba164c6aca6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. Several of these links point to disposable hosting services and appear to be part of a SEO manipulation scheme or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=mbti+types+as+zodiac+signs PDF link annotation
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/warobazi.pdfIn PDF document text
    • https://jesofoxera.weebly.com/uploads/1/3/1/4/131407857/rudofu_xalapegekugepe.pdfIn PDF document text
    • https://gadolelexuzited.weebly.com/uploads/1/3/4/4/134486477/fijar.pdfIn PDF document text
    • https://vusugurubem.weebly.com/uploads/1/3/0/9/130969976/5599565.pdfIn PDF document text
    • https://dasateju.weebly.com/uploads/1/3/4/5/134582383/3415303.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/sisafudixeb.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/kanirugeg.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/5998854.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/104326988.pdfIn PDF document text
    • https://bonifivudinuf.weebly.com/uploads/1/3/4/3/134305406/wetasekakubilutufuki.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://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_31701465df1a4e78847045aa221350b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb13a419-64b1-4455-b202-91770737b2c1/14957413600.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_87512bb4e16d478d963fff8528631dbf.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_90d39c41c9f84ab2a2651877c13fbc9c.pdf?index=trueIn PDF document text
    • http://sanojepenot.onlinewebshop.net/brown_bear_what_do_you_see_book.pdfIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_ebb96efceeca467dabf90b2b878c3202.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82835aed-0a84-4364-9332-5acd8330c4a8/temple_final_endless_run_3_apk.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/tipos_de_comunicacin_organizacional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da2efb7-1098-4e73-b072-1d8a976dd480/net_interview_questions_for_2-3_years_experience.pdfIn PDF document text
    • https://729e2492-2f58-4395-8fc7-9c3224905174.filesusr.com/ugd/e23fbb_d35d5d648f554ebe921054a423dbda9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43ab2bd-4c68-4449-b951-d4f049cf1d6b/60523049443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26ca13b-b382-4498-a87f-357ede003d08/xenusiwa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 5196 bytes
SHA-256: c58340e7e38d751269b3152a63602effed6eb95227e330d8cc47f78298eff539
font_01_sfnt_off00010eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEE 11188 bytes
SHA-256: f1394bc237a83e9ad0e49241f16e5504900246839b0cf8c0e94993c2db573884
font_02_sfnt_off000134e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E9 18340 bytes
SHA-256: e14b34e8765f31b7104932bfb95f5b104ce650b4cc31e8d4b6e995ef0357def6
font_03_sfnt_off00015121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15121 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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