Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26840afc8689358…

MALICIOUS

PDF

100.8 KB Created: 2021-03-14 21:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 862bb1472a45a9cd40d0f0bbf6d8caa6 SHA-1: 86cf497429cc434da2b34378f3227f7304cee023 SHA-256: e26840afc86893581f05b679a61090856834ae65c90144d0d4d87f27e38d3adf
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, suggesting it functions as a link farm. The primary malicious activity appears to be directing users to potentially harmful external websites, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=devil+in+the+white+city+imagery+quotes PDF link annotation
    • http://bloomwithdeanna.com/how_to_swap_tiles_in_scrabble_goruzgl.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/jowokakujejowu-waxaxevatiweb-pifubobovez-levex.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/6204053.pdfIn PDF document text
    • https://sikukaposarimi.weebly.com/uploads/1/3/5/3/135307882/a100672e.pdfIn PDF document text
    • http://natlegend.space/that_s_life_in_french_tattooxq1i7.pdfIn PDF document text
    • http://ogranicbio.fun/what_is_islamic_governancezvp7t.pdfIn PDF document text
    • http://help-service-support.com/63599621166b61ps.pdfIn PDF document text
    • http://particulieres-societegenerale.best/asistencia_uber_mexico_telefonofbge6.pdfIn PDF document text
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/bujorewiteb.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/12c6e970-ef56-40b2-96b1-772f2f25ff13/weguvuxikasenalaxezobotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc23f357-d5cb-4e7d-9f55-17ca243add44/kitomud.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/50399664569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a45e10-2ea1-47a8-b690-1a57baf1c4f9/51055019918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f6be56-c0c8-4fac-8d1b-04b96b494d32/what_is_99_year_lease.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/cognitive_biases_psych_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/62501084821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f128be95-a990-4987-8ca2-8e672cc981fe/buzodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b859d408-b1a6-4262-b18c-b78e7ecaacec/zurotixexulenobiverixim.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/messenger_windows_8_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428072ee-4034-4e9f-9cb1-7442edcfe4a5/easy_piano_christmas_songs_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/43076492324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0615d42-de3e-4bbb-89c8-e0ee5b479875/egyptian_yoga_postures.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/10137815136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c28053-3127-4632-ada6-72b1931d38f4/iphone_5c_price_in_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ba88bf-af5d-4fd2-aff8-d91b28690891/westell_a90-7500_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A30 5592 bytes
SHA-256: 21c0016e5fd8cabe5ab4f478fe168a37c0ec19ed8e075a6d2d5184b42724d560
font_01_sfnt_off00015d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2B 11360 bytes
SHA-256: 22b2c6de78dc285c8d452631100758d483749a90569be035d7eeb406e4ecc4bf

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