Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be0e9c51fbc8d4f…

MALICIOUS

PDF

86.5 KB Created: 2021-02-22 20:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 974278fd2663cd786b4e25178b808aba SHA-1: a6282b7189b3fb8337a369a0b3f61d747d3c7f09 SHA-256: 4be0e9c51fbc8d4f3b23cdc71a8bb7ce7530946715d771c013596547fcfeac27
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of numerous URLs, including one with a UTM term suggesting a specific lure, points towards a phishing attack.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/strik?utm_term=ar+15+pistol+legal+in+virginia PDF link annotation
    • http://obschee.xyz/77472275297vlph5.pdfIn PDF document text
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/gavixemawapus.pdfIn PDF document text
    • https://bufekebutejef.weebly.com/uploads/1/3/1/8/131856184/5383937.pdfIn PDF document text
    • http://servicesforsupport.com/how_many_carbohydrates_are_in_a_taco_bell_crunchy_taco_supremem4k83.pdfIn PDF document text
    • http://mazers.fun/ant_radio_service_app_co_to_jestsp0au.pdfIn PDF document text
    • http://furniture21.online/types_of_supply_chain_management_pptujhre.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/7TiVn55/luwununivofojopujag.pdfIn PDF document text
    • http://podeves.xyz/55862253243txl0r.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/eTjgiaS/pet_circus_ottawa_on.pdfIn PDF document text
    • http://indir-kazan.com/dopagopem4c9o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapijapixezido.rf.gd/first_conditional_worksheet_with_answers.pdfIn PDF document text
    • http://jozeratajugik.rf.gd/gesozezofusovil.pdfIn PDF document text
    • http://sabinozugi.epizy.com/pizimutadakudezisopefebex.pdfIn PDF document text
    • http://zirafefovijab.epizy.com/palozagonusufulal.pdfIn PDF document text
    • http://fetevatakipip.epizy.com/natufa.pdfIn PDF document text
    • http://meduzifovum.epizy.com/76230247772.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_off00011481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11481 5212 bytes
SHA-256: 5d1275addd58be778738dd4bb821c4e85688a7153ca307ace91a942449acf9ca
font_01_sfnt_off0001265a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265A 11208 bytes
SHA-256: 9686f4429b5d5a285d8c857e239b8c8a91123350d83ef18cfcf6b6d0f230dcf9

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