Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1934f5a33e827c…

MALICIOUS

PDF

80.0 KB Created: 2021-03-06 18:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a729907685750ba1558c2fdf97fe755c SHA-1: 8f5b41d6a2c58fa7d3c262f177b61173d40a429f SHA-256: 7f1934f5a33e827c0ca23c436fa3c1dc9413478b1b37ab24ffc84730456b52e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a lure related to "Hill Climb Racing 2 hack coins and gems" and exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically flagging it as a phishing trojan. The presence of external URIs and the overall structure suggest the document is designed to trick users into downloading a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://fokemale.ru/wix?keyword=hill+climb+racing+2+hack+coins+and+gems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5ff50c2b51228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_6024cc85542d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_6029eb0f4b2e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_60293176ae474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fd308f4eaa1b.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/5227211.pdfIn PDF document text
    • https://litiwufedoza.weebly.com/uploads/1/3/0/7/130739575/454088380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447095/normal_5fca6b5e38a87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5ffddf0e080bc.pdfIn PDF document text
    • https://fudesatalaponu.weebly.com/uploads/1/3/2/7/132710537/2484483.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/jonibobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474997/normal_5fcfb3cd20edf.pdfIn PDF document text
    • http://repovor.22web.org/83245007098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425760/normal_5ff9049a1bd3f.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/3116663.pdfIn PDF document text
    • http://vavisavig.22web.org/assignment_contract_wholesaling_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475995/normal_5ff5805419abc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_c583492d0ef347ceac223e3e774d4146.pdf?index=trueIn PDF document text
    • http://xeziribosivamis.epizy.com/chapter_13_worksheet_1.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_a471452d706847e49b9bc56e4787dede.pdf?index=trueIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_2099cd3aba9444f59722fd3a4eb1fc65.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_86a527e698d14d4c82801cedc5942d07.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_84e49843613c4e60b5c0d045efeb21cb.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_af25b51eedeb476eb56e42914887a4d9.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_7af726c01c074390b18de143a1f784c9.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_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 5652 bytes
SHA-256: 18d00af8abf396210db7878333b74cac4720da69d5021480b5ccd7fbd1a7f2f0
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10496 bytes
SHA-256: c253fb7c79379b73f38e252209572219411541b4cc1b79a91bcb49a8169f2e05