Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02785239e2c3d49…

MALICIOUS

PDF

143.4 KB Created: 2021-03-18 00:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e95b342906a68b9332becf09861659 SHA-1: 1034dffd2aa656cd889990fe956e67646a61d56d SHA-256: e02785239e2c3d496c5ee4dfdc8a96bd62f60f67383c93822800a5f734cfc1a2
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated and appear to be part of a link farm designed to manipulate search engine results. One prominent link, 'https://crophysi.ru/aws?utm_term=1000+point+nurgle+army+age+of+sigmar', is disguised as a search result for a popular game, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9405

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/aws?utm_term=1000+point+nurgle+army+age+of+sigmar
    • https://cdn.sqhk.co/xenudipu/iS1cXYl/sirotutuzekigak.pdf
    • https://cdn.sqhk.co/wesuwajil/fje3Fam/kiduwemoveraxisivifona.pdf
    • https://cdn-cms.f-static.net/uploads/4369901/normal_600d97e49f565.pdf
    • https://cdn.sqhk.co/xevowuto/eqhccbE/10722522005.pdf
    • https://cdn.sqhk.co/wabitakenina/gg5ifig/aca_neogeo_metal_slug_3_switch.pdf
    • https://cdn.sqhk.co/sixitigoxeto/jjU8rhd/penalty_kicks_game_online.pdf
    • https://static.s123-cdn-static.com/uploads/4415331/normal_5fc9cbfc0d760.pdf
    • https://cdn.sqhk.co/mobubivifa/djcbji1/ghg_clockwise_login.pdf
    • https://cdn.sqhk.co/biloriput/ve0jiJ4/wezebajepedim.pdf
    • https://cdn.sqhk.co/dibitarebizu/xf5jhU5/89373701657.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_4a156f36209b498c9d29fe8e7e4bc94e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/12c9323f-7e8f-44ef-b26f-edaa202ac168/92535056300.pdf
    • https://uploads.strikinglycdn.com/files/2bca5412-e651-4217-b9d0-4de2ecc65bf3/roxexuwetorubatesuguzen.pdf
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_83793c09ebb940549922dbabbfbced1d.pdf?index=true
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_d9d9f4cb715c4eaabbb96b4b5dba6699.pdf?index=true
    • https://uploads.strikinglycdn.com/files/05334d8c-31f0-418b-ad5d-705807cf836a/english_lesson_speaking_activities.pdf
    • https://s3.amazonaws.com/lumixi/tutabezaduvazajiwedop.pdf
    • https://s3.amazonaws.com/sajatofubote/international_business_the_challenges_of_globalization_global_edition.pdf
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_22cc2c679e62448caa13d115ea949b6f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/850653de-1de7-4bf5-87f7-7e81ca57ab3d/can_am_outlander_500_maintenance_reset.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002181d.bin
21768dcf9ab1c67d8069fc5c5e1d8fa60a1b106ee3567bcd14fa4c0cb36844cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x2181D 3664 bytes
font_01_sfnt_off00022559.bin
e72bd181079ec05b8fe797b4c707f84a0e440e9251cc36546be7bdbfdff586a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x22559 5304 bytes