Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e212d26aeda2766…

MALICIOUS

PDF

81.9 KB Created: 2021-03-12 20:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c3eaab8234dded6c29e156a81da2b216 SHA-1: c3262b98f30a04d5d7004db403e90e82ff271d5d SHA-256: 3e212d26aeda2766aa22a1da91d3baf3b6fa0fef95fcd6e8cc7198c9e0f0b1ff
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or link farms, suggesting a phishing or SEO poisoning campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=personal+math+trainer+homework+answers PDF link annotation
    • http://driveformclanemilwaukee.com/kinagujebaq6wq.pdfIn PDF document text
    • http://mxbur.fun/gaxogogvrf0z.pdfIn PDF document text
    • http://sportplays.ru/vakitenezimegerip1epco.pdfIn PDF document text
    • http://life-news.tech/how_to_install_acurite_5_in_1_weather_stationol9qz.pdfIn PDF document text
    • http://mantenancie.com/56672314669pkxlz.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/brzezinski_strategic_vision.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/9d820261-235b-49e4-8e4f-0514680c8746/trane_tracer_sc_default_password.pdfIn PDF document text
    • https://3f054cde-0430-4828-89d0-5f77035cf230.filesusr.com/ugd/d93890_1343fb88e5254913aae92dec83b7281c.pdf?index=trueIn PDF document text
    • http://rosevasejila.myartsonline.com/full_catechism_of_the_catholic_church.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffa9e37-2953-42b7-9a4e-6f7d153a9ab6/weber_grill_restaurant__academy.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/what_causes_commotio_cordis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15374d4a-2d61-4add-a2fc-1aad49b65d59/kill_team_40k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06469b6-05c0-4cd3-b71f-a26d1a7b219d/idiom_worksheets_for_esl_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67186a7-6ad1-4541-bea1-86691bcf2359/why_did_they_stop_the_lying_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c4a3f9-1ddc-4faf-b7e1-8311b33d14b5/how_to_explain_tone_in_an_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425eca39-32fe-48fe-9cc9-1802e2c1c7fd/56226239045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7461e0-e93f-4192-bc94-d2c9f3560905/graco_magnum_x5_manual.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_75ab30753ca14967a49ef26ad151ef50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9f1108-2067-4036-bcf4-8c6228d3ca30/how_much_oxygen_does_a_non_rebreather_mask_deliver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db72c826-8dfc-44b2-af49-081154e2c56f/amplificador_clase_d_circuito.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_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 5084 bytes
SHA-256: c66f012192837d955dcbda8ca4b4222d7de075ee5801a14829c3ad32580c52e9
font_01_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 10500 bytes
SHA-256: 22e67a9b5d0758e3508f6d43614b3074636b613eaa0597a4424600e23c7a996c