Malicious PDF — malware analysis report

Static analysis result for SHA-256 8529006f262aa333…

MALICIOUS

PDF

68.5 KB Created: 2021-02-23 13:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f1fa9792b5bfee9aa563200259c08624 SHA-1: b64fbaa72cb469026ba769abd9b05726acc6a374 SHA-256: 8529006f262aa333e3df7b343d1c6e70e3eb1bf2c10e4f1846dc9d958ce6240b
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous external URLs that likely lead to malicious sites or further payloads. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=recordable+pro+apk+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376874/normal_600909e793fee.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/bRheij2/bola_cricket_bowling_machine_balls.pdfIn PDF document text
    • https://cdn.sqhk.co/jutirupot/jaCiiIQ/sword_art_online_arcade_deep_explorer_wiki.pdfIn PDF document text
    • https://mogobuzuxoxede.weebly.com/uploads/1/3/0/7/130740257/jeruzajaseba_mufodajupatizix.pdfIn PDF document text
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/df888d1f4.pdfIn PDF document text
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/6163241.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/tigevinuzakubu.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/ibAFSid/top_5_ringtones_2019_free_download.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/887d793e390.pdfIn PDF document text
    • https://vobisikokupitux.weebly.com/uploads/1/3/5/3/135348895/2e2d51a779a1.pdfIn PDF document text
    • https://cdn.sqhk.co/dojozafo/kYswjcD/roads_of_rome_2_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/ibghhjU/99911187627.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/4698642.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/gcPgcha/booking_revolution_pro_license_free_download.pdfIn PDF document text
    • https://rikumuxazomibib.weebly.com/uploads/1/3/6/0/136082685/lelakarum.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/7874711.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/euf2Yii/final_fantasy_vii_remake.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/439d5f3a.pdfIn PDF document text
    • https://vedisowokiwovos.weebly.com/uploads/1/3/4/7/134767265/9489557.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/7735523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ceb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB7 5620 bytes
SHA-256: 0df61a7b0269b2911eeb27524da644d2c8beaaaa798425aadd4ebdb861a7b7b9
font_01_sfnt_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 10120 bytes
SHA-256: a87eb1b44c6a22bdde0906fa0d09d21a2982ecdd0fac22c99d94d7bc4b78531b

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