Malicious PDF — malware analysis report

Static analysis result for SHA-256 9375865cf7fd8f8e…

MALICIOUS

PDF

70.5 KB Created: 2021-04-29 20:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 44487854688ab564dfb733d158032334 SHA-1: 05cdf8311842fa0e1e11b1bb6ac06fdd494c8d4e SHA-256: 9375865cf7fd8f8e326f524f6a847b1574dfb97d23044c05ec4f7e9a0bdd5df0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a phishing lure and a link farm, with a high ML classifier score and ClamAV detection. The embedded URL points to a suspicious domain, likely intended to deliver a malicious payload or lead to a phishing page. The document body, though heavily obfuscated, contains text fragments that could be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/strik?utm_term=schlage+camelot+handleset+parts PDF link annotation
    • http://youtube-subscribes.com/bhagavad_gita_slokas_in_telugu_free6cgc1.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/sony_vegas_pro_13_32_bit_serial_number_1stiyv7e.pdfIn PDF document text
    • http://erogan-encolumbia.site/xinupijugarikosuzewek3sc0n.pdfIn PDF document text
    • http://serviceforyou.site/pengenalan_agama_islamutky0.pdfIn PDF document text
    • http://saudiautoinsurance.com/how_to_calculate_interest_on_a_past_due_invoicegwzfd.pdfIn PDF document text
    • http://neo-tp.ru/cisco_dpc3825_firmware_upgradea0z39.pdfIn PDF document text
    • http://luminar3-download.xyz/69349926963f783d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_c48136b24fe943ccad24efe2106d4c77.pdf?index=trueIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_0454f5bc236c486894ed4f5dac8c1874.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3348fd68-2d7b-4b42-afb5-924f09cdfb82/vapujuvubo.pdfIn PDF document text
    • http://butemuz.epizy.com/53187680315.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/how_to_find_the_value_of_a_used_car_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6284055c-4cc0-411a-b218-139dc12eac80/36500577183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18354f3-33e4-4cf0-bf79-469cbb2f2d29/internal_medicine_case_files.pdfIn PDF document text
    • http://wavusuwu.epizy.com/fanixi.pdfIn PDF document text
    • http://teraropabu.epizy.com/17746152741.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/madexu.pdfIn PDF document text
    • http://simirized.epizy.com/29041983508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4ec8db-e35b-4ebc-b67d-0becd5026fa9/pencil_portrait_drawing_techniques.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_off0000d3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 5592 bytes
SHA-256: f6e0fe432ce1c55a3ec788bead4706745a6868e31b9ab6337865300162a319c7
font_01_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 10736 bytes
SHA-256: b7953f68c15b321f20e1c49be382bef30fde1b54aaed0c28d609a1c75689aacc

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