Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee2f48ca749363d…

MALICIOUS

PDF

75.0 KB Created: 2021-01-26 23:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37a0a2293b621bb17415401f616486a6 SHA-1: 4947778f2074d4af9f49da8ec4f19347299c32b2 SHA-256: 4ee2f48ca749363d33ebf558f5ca12f45a434b1a6f71cf0bb5d2920aab995d29
186 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, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://druttle.ru/123?utm_term=kentucky+state+police+commissioner+salary PDF link annotation
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/7526178.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/bhfihzJ/sdge_power_outage_report.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/midaxage-devap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5ff9c61210130.pdfIn PDF document text
    • https://mugijimefulex.weebly.com/uploads/1/3/1/6/131606494/zogifu-juxelojiwudatox-wipasavowixumuv-kezekamagebonu.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/igggCib/ikea_living_room_furniture_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/GhapTjb/gangs_of_london_cast_episode_5.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/gaifjck/warhammer_age_of_sigmar_armies_ranked.pdfIn PDF document text
    • https://lonapumerupa.weebly.com/uploads/1/3/4/8/134853684/8635025.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/doderiwurab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fcae6b6359f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5ff3acd18e37e.pdfIn PDF document text
    • https://pedidifapa.weebly.com/uploads/1/3/0/8/130874671/a9608a06865c220.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/jjjdiDM/radio_italia_app_free_download.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/4dd0b2e0b6a8.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/fawuzafoxifon.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/pagadepogufe.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/4df5820bc0.pdfIn PDF document text
    • https://nugiwilog.weebly.com/uploads/1/3/1/3/131384260/darawegilatonuj_ledadem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebeminozari.epizy.com/29781598069.pdfIn PDF document text
    • http://biwonopo.epizy.com/88932233241.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/thirsty_crow_story.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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 5212 bytes
SHA-256: f514ebbf1737b1dab08e0816c4b57ddf54d8a3f628a59589a1451970731a512a
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 10964 bytes
SHA-256: 9304b55dc6e3e8bfac82d1d1ee1699bb4751139bf140a443b48fdc043a1bb351