Malicious PDF — malware analysis report

Static analysis result for SHA-256 839264203b7ea014…

MALICIOUS

PDF

68.1 KB Created: 2021-03-25 18:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ecc167eee0917e9d12b8c0614b828dbc SHA-1: 8c5588ad273996c897ab3a4512caf28a821e6b19 SHA-256: 839264203b7ea01478f79f933a9e79ecc0f89a33d8a7379c564311e320389bc4
126 Risk Score

Malware Insights

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

The 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 hosting, and the document body, though truncated, includes a reference to 'Purulia baul gaan free' alongside application metadata, suggesting a lure. The presence of external URIs and a link farm heuristic indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=purulia+baul+gaan+free PDF link annotation
    • http://habirovradik.ru/simple_past_tense_regular_verbs_exercises_multiple_choicezepwc.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/cable_tray_standardserudp.pdfIn PDF document text
    • http://larebalin.mypressonline.com/62140586914.pdfIn PDF document text
    • http://mif-smeh.space/47248316525xzc1q.pdfIn PDF document text
    • https://cdn.sqhk.co/nanuvoxeva/RA76VRP/xomojosufowisawado.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/cassegrain_antenna.pdfIn PDF document text
    • http://securespot.ru/taverudezujuk9ifh.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/rjbigZy/commander_s_intent_army.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/Y4Xje8y/74019264292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/how_to_make_vinyl_decals_with_cricut_expression.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_d2fd3d2caac446e4a36f97f86d1e2678.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_0ba5c945d6684d8f948d9fc3de96a452.pdf?index=trueIn PDF document text
    • http://mepitar.atwebpages.com/20986296258.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_b3947ebbc941462aa21978926e102983.pdf?index=trueIn PDF document text
    • http://bagugexasorip.myartsonline.com/alternate_segment_theorem_proof.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_6263401bcdf340f3a65f240d1d689fc9.pdf?index=trueIn PDF document text
    • http://bivojeda.atwebpages.com/how_to_check_login_on_facebook.pdfIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_f7f68447cbc34a93ac374bf7731fbc31.pdf?index=trueIn 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_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 4900 bytes
SHA-256: a1035d0fd5d8b651dfd61e75f93e84458060ea0d78b443bb5f959a4a02b528b3
font_01_sfnt_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 11020 bytes
SHA-256: d35f6426e0d6204fc992250a4a529b42c8e2e8dfdc543e8b623e42aedea12594

Open this report in the interactive analyzer, or submit your own file for analysis.