Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1194231e349513…

MALICIOUS

PDF

74.8 KB Created: 2021-03-05 12:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 32d9fd0ea0a250ef7f25002f7318ff01 SHA-1: 0ed6ec8d661446f8d9c25eb72d1bf60d3f1b6f9c SHA-256: dc1194231e349513b588285cd73fdb75b2367155722f9df77bfdeafd108d69bf
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains numerous embedded links, many of which point to link farms and redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'making a homemade fire extinguisher'. The primary malicious activity observed is the redirection to external, potentially harmful websites, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=make+a+homemade+fire+extinguisher In PDF document text
    • http://mattelipsticks.site/why_do_germinating_peas_undergo_cell_respiration4vyrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_600a9739da7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_60384a0c635d4.pdfIn PDF document text
    • http://esmoney.site/is_sao_alicization_a_prequelo0f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5fd9348547cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fcdcc41cfd34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_6015d6743ae13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fe5f1eddcecd.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/venakupozetitaxurimumupa.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/kojotokavigagoxanipew.pdfIn PDF document text
    • http://pollsexpert.com/77247920112hr0l4.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/72426711363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_601bb12450233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_6024572ee326a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_6020d137cfedc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagugexasorip.myartsonline.com/41723087290.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/48623528158.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_aae452f875fc4c4bbdc35cffce900643.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_fe3c4fc130ec418ca95082c5f84542f0.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_96ce5f08c8f94f158338d11171c5fa7a.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_d493b1165426455bb762ff662186df0b.pdf?index=trueIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/electric_scooter_repair_san_diego.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_0d339fee227145539ef0276bddf4f54e.pdf?index=trueIn 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_off0000e7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FB 5428 bytes
SHA-256: 0477e47d2dd8699c7defc0d4a4d21f926364dd63d7c45050fa000cfc325435ea
font_01_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 10288 bytes
SHA-256: 2a7349b797976e097a138c4bc8d7f70b08e9ec7ee43fa48baaad8e86f0a84c2b