Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d73a3115b822f3…

MALICIOUS

PDF

91.3 KB Created: 2021-05-27 19:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 52da19c6129b72379a22be35964932d6 SHA-1: 30b8cee2a28f08b42500b9e8f261e9f5888d9756 SHA-256: 03d73a3115b822f36913f530b08ab924cfb90a937f42de3bb8497c06abcc8297
234 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and a 'password-protected archive' hint further supports a malicious workflow. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pokemon+silver+randomizer+rom+download+gba PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5ff78369e8303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_602405b3155ba.pdfIn PDF document text
    • https://domigatozod.weebly.com/uploads/1/3/4/7/134717876/239a7d1cee3.pdfIn PDF document text
    • https://gerasopotegovo.weebly.com/uploads/1/3/4/3/134374655/lamope_xipapa_rularube.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/dugosuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_604e3ca1dacfa.pdfIn PDF document text
    • https://juderesovabivov.weebly.com/uploads/1/3/4/6/134680251/fosugadexusofu-ferokevimuxa-pigamafagavix-gowag.pdfIn PDF document text
    • https://zabemukud.weebly.com/uploads/1/3/4/6/134614305/putitowofil-musolimawuzog-laturevi-roropo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_6035b892f1b4c.pdfIn PDF document text
    • https://milalidit.weebly.com/uploads/1/3/1/4/131437162/kudomafilav.pdfIn PDF document text
    • https://kebotufu.weebly.com/uploads/1/3/4/7/134735966/1560093.pdfIn PDF document text
    • https://fewifaki.weebly.com/uploads/1/3/4/5/134578400/4135891.pdfIn PDF document text
    • https://gevaboru.weebly.com/uploads/1/3/4/6/134685165/7589322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_603a08808934f.pdfIn PDF document text
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/waxibifexatewesereju.pdfIn PDF document text
    • https://potamowirojix.weebly.com/uploads/1/3/4/6/134688714/topowipikavosozotu.pdfIn PDF document text
    • https://gavivexov.weebly.com/uploads/1/3/4/6/134667590/3894371.pdfIn PDF document text
    • https://vedifejoroda.weebly.com/uploads/1/3/4/5/134521361/susupotovu.pdfIn PDF document text
    • https://vekupaju.weebly.com/uploads/1/3/4/4/134479754/4caa446b34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33c2fa5-18e2-417e-8e28-9b255d6f9f1d/6832551538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2a6d2d-5bdf-4792-ab55-34a6d45bb7cf/jadedurum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237b9f9f-97aa-45d9-8260-4cfeae4f69dd/ingenuity_simple_comfort_cradling_swing__rocker_-_raylan_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adcf425-c8fd-4ba3-94be-fca216e6e545/pasixavasilonad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 3876 bytes
SHA-256: 1e006f5ba391455eb246cdf03e0de45726f3ca7a422dad97620f0ce085df5c64
font_01_sfnt_off00011476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11476 5552 bytes
SHA-256: 0ce9b471f73bbc61863d410002dff238596917191326d44b83da3b67ea4d362f
font_02_sfnt_off00012764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12764 11404 bytes
SHA-256: 8fd044e9efe1efe5662ae30d67a6569cae03f2bfedcd4c36164a691889941020
font_03_sfnt_off00014e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2A 4404 bytes
SHA-256: dce290c37a49f90d0bffae12dab4617f781d0f189f13b2dc9f9ebbbdc7c604d3