Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2b93de1cba9dcf…

MALICIOUS

PDF

73.7 KB Created: 2021-05-08 03:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a912b8d9dd9672e58a61237c319087cc SHA-1: 52ea55eec5fa94273386fe6c06d6f2e6148a196e SHA-256: dd2b93de1cba9dcf68b1cb0a4c4d00402283f2d5c46b5b479a11327a33561904
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/strik?utm_term=2+way+radio+belt+holster PDF link annotation
    • http://kifopelidito.mypressonline.com/kuvopegexewoji.pdfIn PDF document text
    • http://goduvide.22web.org/klein_tools_ncvt-2_how_to_use.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/gcageQf/2711250143.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/how_to_swing_trade_free.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/blacksad_vol_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kivutuzo/hfjiaic/generations_the_legacy_2020_teasers.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/ia1idhb/inductive_and_deductive_reasoning_worksheet.pdfIn PDF document text
    • http://freud.icu/jurobebap30j4.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/hfjChf8/rebirthing_skillet_meaning.pdfIn PDF document text
    • http://beliyden.xyz/73103883244an22u.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/censoring_in_survival_analysis.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/penatalaksanaan_abortus_inkomplit.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/jdxschc/design_quote_template.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
    • https://s3.amazonaws.com/rivazixexuguri/rawiwodulufokomun.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/sony_wireless_headphones_mdr-_zx330bt_manual.pdfIn PDF document text
    • http://kitekevuvalu.rf.gd/full_wave_bridge_rectifier_operation.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/how_to_do_emdr_online.pdfIn PDF document text
    • http://sesisat.epizy.com/ceinture_orange_krav_maga.pdfIn PDF document text
    • http://desuvusemexemob.epizy.com/handwriting_practice_sheets_for_3rd_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/21076218533.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/federal_rules_of_civil_procedure_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/iso_iec_27001_lead_implementer.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_off0000d5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F0 4968 bytes
SHA-256: 0aed8ec8faa131c44dae996820439a6ed490d821bcf808ff39483686d2fd9c11
font_01_sfnt_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 10608 bytes
SHA-256: 230fc4a978c27f4dd1fb2ade41650ed0b5cf1432a1b577a7196b24129e254e49
font_02_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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