Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db8130fd54a8738…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 18:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 16dffdb751d7a6902b4726614c1072a0 SHA-1: cb0c9f8140e16e3fd2e2accda86cf122bfe8c601 SHA-256: 0db8130fd54a873820fa0ddae35a040f1dcd89fd7911a0a5b383220a8a7e8251
146 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document may prompt the user to call a phone number in a deceptive context. Although no scripts were extracted, the presence of numerous suspicious URLs and the ML classifier's high confidence score point towards malicious intent, likely related to credential harvesting or a scam.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=apply+for+food+stamps+online+at PDF link annotation
    • http://miromawetibikew.mywebcommunity.org/pinguino_air_conditioner_lt_code.pdfIn PDF document text
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/bitop.pdfIn PDF document text
    • https://zisumujabi.weebly.com/uploads/1/3/5/3/135315444/6361922.pdfIn PDF document text
    • https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/sovajox.pdfIn PDF document text
    • http://mestorating.ru/example_of_author_note_for_apa_formatuz6bh.pdfIn PDF document text
    • http://liteponezugom.22web.org/cia_human_resource_exploitation_training_manual.pdfIn PDF document text
    • http://lirelejavebot.iblogger.org/helicopter_cheat_for_gta_vice_city_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_602e1d2f88377.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/38895323110f1j15.pdfIn PDF document text
    • http://energierecrute-emplois.com/easy_notes_notepad_notebook_free_notes_app1e8ud.pdfIn PDF document text
    • https://zedemozotazodi.weebly.com/uploads/1/3/0/7/130776451/gevezogela_pilosatulew_pomoped.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_the_most_viewed_rock_song_on_youtube.pdfIn PDF document text
    • http://websporizle3.com/tamil_love_story_novels_free_download1j0yx.pdfIn PDF document text
    • https://rikodagipavas.weebly.com/uploads/1/3/4/3/134334006/nanowoduvixim_sojobifoxure_meresivovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibofive.epizy.com/pupagosidive.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/47297242769.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/nibozerimaju.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/13973074128.pdfIn PDF document text
    • http://gefuxexo.epizy.com/bipekivir.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_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5276 bytes
SHA-256: fce2a8279078c81b00e320e51cec7280623ee02c30da8f552c23e940490da371
font_01_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 10876 bytes
SHA-256: 344431c8a754a84da44dd38bbafaaddfe75452ecd3b8953bd630f05b130a54b0

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