Malicious PDF — malware analysis report

Static analysis result for SHA-256 af07a66b078136a9…

MALICIOUS

PDF

73.3 KB Created: 2021-03-08 22:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c4fd45b71a54d5afba7a9a038c732f30 SHA-1: 9fb35924b73871a3e632bd635058f44cc7a130a4 SHA-256: af07a66b078136a91dcceb5454f6083932d2c5e2b0255b17ff6fc1d94d93b6dc
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://mezovuduw.ru/wix?keyword=gamegem+apk+ios PDF link annotation
    • http://filanion.online/66062898762eebmn.pdfIn PDF document text
    • http://ezfix.asia/53088545853cwyxi.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/jojunomeru.pdfIn PDF document text
    • http://varakeno.iblogger.org/daughter_of_smoke_and_bone_liraz_quotes.pdfIn PDF document text
    • http://blubadgehelp.net/33470945533l0gl9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lafumiseweno.epizy.com/44609024851.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_ad2306037b454ef19ff275f394a4c3d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/318ab1ba-dae5-4e31-ba72-a9e4bd57564e/after_anna_todd_book_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb8f9d5-0d7b-41a4-951e-01444845df39/can_i_use_a_digital_converter_box_with_a_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/gdp_per_capita_income_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9d0a6a-1d56-487a-a661-afaf4a7f2ea2/cbt_nuggets_python_programming_language_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/26679662223.pdfIn PDF document text
    • http://xaviwawav.epizy.com/wondershare_mirrorgo_for_pc_windows_7.pdfIn PDF document text
    • http://fitewuvo.rf.gd/mepawobafaxilotiruma.pdfIn PDF document text
    • http://bonezulaw.rf.gd/29881905894.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/1099_barter_form.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/93259448414.pdfIn PDF document text
    • http://kemufare.epizy.com/arjun_reddy_full_movie_free_isaimini.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_4870769227b94be59e4e92869011db72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/os_axiomas_de_zurique_free.pdfIn PDF document text
    • http://sefudupufojuxo.rf.gd/33873190912.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_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 5108 bytes
SHA-256: d3108e12cac5e3af9299022767a82bc3572a56ac2c27121dfc6ac7a24fa823eb
font_01_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 10816 bytes
SHA-256: a4be35e8e1b231f6320b0b8f4baf4d334392420363b305638bfc631a0886d41e

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