Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d417305dfb730b3…

MALICIOUS

PDF

100.9 KB Created: 2021-03-26 09:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2b6fc5dc069b0794dd1a4eb748896143 SHA-1: c96c2b133089b3266b32b0a0946df9d46a34f4a6 SHA-256: 4d417305dfb730b3349c20a4b0839dffafa2423deec4946a1c01a7acf9764274
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which point to disposable hosting or redirector infrastructure, suggesting a link farm or phishing campaign. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating the document's primary purpose is to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=benadryl+injetavel+bula+pdf In PDF document text
    • http://famuxapow.iblogger.org/voxakexejijomorutewerut.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/9893375.pdfIn PDF document text
    • https://tidukunetubuf.weebly.com/uploads/1/3/2/7/132710673/c913fd2.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/affidavit_format_for_name_spelling_mistake.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/tozogerizisovepit.pdfIn PDF document text
    • http://sanadewa.iblogger.org/advertising_company_logo_vector_free.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/6579226.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/misarorefi.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/c48f48b2ba33.pdfIn PDF document text
    • http://bunakevogipo.iblogger.org/joravesofesutekobibi.pdfIn PDF document text
    • http://cmb-accueil.com/how_to_set_personal_targetsjlugv.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/8930425.pdfIn PDF document text
    • http://espaceabonne.com/79897309467ti73u.pdfIn PDF document text
    • http://fipevowes.iblogger.org/schwinn_stationary_bikes_for_sale_near_me.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/86ec88c508275b.pdfIn PDF document text
    • http://jumbochecker.com/1003087151619k05.pdfIn PDF document text
    • http://worldthailand.fun/chuck_tv_series_free_mp47eicv.pdfIn PDF document text
    • http://wokelegekak.66ghz.com/71137762581.pdfIn PDF document text
    • http://specrazreshenie.com/914217952916g9ad.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/iahjjd9/gowexitezifogifukeneronu.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/2c2d6ed9656ba05.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/aiiiiuq/hope_pics_for_fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://revodez.myartsonline.com/algernon_blackwood_el_wendigo.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/begag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C52 5056 bytes
SHA-256: 9927fe3a70da921c9d8fb7f54f11a63cfc8f97fd09606bfd45a68b51797e676e
font_01_sfnt_off00014d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D93 14416 bytes
SHA-256: 71e0d4c350206b2caf5b82f85c07f47c8c5d7070b092a89e21fd4a73416ef5fd
font_02_sfnt_off00017706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17706 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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