Malicious PDF — malware analysis report

Static analysis result for SHA-256 040d7918df6bc41a…

MALICIOUS

PDF

99.3 KB Created: 2021-03-28 16:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: acc4a1abcf74a4d11e33a9c655aa508b SHA-1: bdc689b73818f577aef2703f82161590f450352b SHA-256: 040d7918df6bc41a11a2eca81097b4bbedc3aac2dabba93030ab3e4c05d1eb54
206 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 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/award?keyword=international+air+waybill+form+pdf PDF link annotation
    • http://xebupado.mypressonline.com/xuniluxasomewefux.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/somikividimutoruga.pdfIn PDF document text
    • https://bemisawu.weebly.com/uploads/1/3/4/7/134716701/6987364.pdfIn PDF document text
    • https://zanafuwidug.weebly.com/uploads/1/3/4/3/134353074/8994810.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/rituki_sufopujaxavugex_zirexiwil_dexuzatiwib.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/wizimen_gabazesuxira_gopim_fisubozugiru.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/2504574.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/1612cb9d14fa.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/ropalapudenikiziwijilap.pdfIn PDF document text
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/7971239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tomuvonunilo.epizy.com/38519677125.pdfIn PDF document text
    • http://zukegavodobuxas.epizy.com/kenmore_top_loader_washer_not_draining.pdfIn PDF document text
    • http://pikazunelovo.epizy.com/92373503687.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/cif_cream_surface_cleaner_safety_data_sheet.pdfIn PDF document text
    • http://timodetunidup.epizy.com/33601659266.pdfIn PDF document text
    • http://lodanije.epizy.com/hmrc_business_income_manual_use_of_home.pdfIn PDF document text
    • http://wafitiw.epizy.com/arithmetic_progression_questions_and_answers_class_10.pdfIn PDF document text
    • http://wuviwalot.rf.gd/contabilidad_de_costos_ejemplos_panaderia.pdfIn PDF document text
    • http://lorenivi.rf.gd/feelings_worksheets_for_first_graders.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 5280 bytes
SHA-256: 8e4043143d51823a6d84fb524159ea1bc43fa69524cd789f2d70aec35b3edbd6
font_01_sfnt_off0001406b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406B 12620 bytes
SHA-256: 74367833a1ac7b58d14e6b2fc461b196c37b67b33617fb926c118463e6706150
font_02_sfnt_off00016af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF1 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61