Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6633c80b3d1429…

MALICIOUS

PDF

72.7 KB Created: 2021-06-09 05:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 681b516c1bc06d06d52b08fd17a9bfcb SHA-1: ba71f9c64a236f1beeee13ca83c5aec6162a97af SHA-256: ae6633c80b3d1429057781ec958f6c01f9d5c7360e2fead8a6f8cf9fbd786107
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The embedded URLs likely serve to direct users to malicious sites for further exploitation or credential harvesting.

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://wastran.ru/pbw?utm_term=best+game+on+ppsspp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370265/normal_60661b9d2f354.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/giraleleg.pdfIn PDF document text
    • https://kozunetumoniwav.weebly.com/uploads/1/3/4/4/134482294/73974537652.pdfIn PDF document text
    • https://welarozukakiwa.weebly.com/uploads/1/3/4/4/134497755/c39c9548b0.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/xegizuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff8f6b4ca295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5ff268b6dd99b.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/difovurakoxe.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/gavililomaxik_zazejipusa.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/sikozirozun-fodavimoxadefe-jajonapanufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455884/normal_6008db88bd7be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144590073/what_is_the_enthalpy_of_combustion_of_magnesium.pdfIn PDF document text
    • http://bopidix.pbworks.com/w/file/fetch/144866082/cooking_fever_hack_unlimited_gems_and_coins_free_download.pdfIn PDF document text
    • http://gogevuz.pbworks.com/f/49554542398.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144626811/how_much_will_5500_watt_generator_run.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/xogasug.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/f/how_to_take_apart_a_reebok_treadmill.pdfIn PDF document text
    • http://vazufatar.pbworks.com/f/kiveli.pdfIn PDF document text
    • http://vezawegafu.pbworks.com/w/file/fetch/144798009/skyrim_where_is_solitude_jail.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_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 5060 bytes
SHA-256: 50b88422b21e0d463e4d1fc363695c0fbb172579280958b52214ca1185104a91
font_01_sfnt_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 10548 bytes
SHA-256: 8a7e3e9144df7b3fb6a6ef7a6435e964ef766363c4680685391dd293b7d02ef8

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