Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3378aabdd9800a3…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 06:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7531df1ec70444e313ed202f27fa6dfe SHA-1: e79edc9f7f7de7fc4f7bf8732428d9e5893a8538 SHA-256: c3378aabdd9800a3218e77463f46d350dc3bff513f89be3ae4f355de3d54d88e
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to mimic search results for educational materials. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is part of a campaign to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=ncert+maths+textbook+pdf+class+12
    • https://cdn-cms.f-static.net/uploads/4479222/normal_5fe899266df89.pdf
    • http://kurs1.xyz/how_much_is_a_wii_u_at_walmartbp98w.pdf
    • https://dinurafilaxu.weebly.com/uploads/1/3/4/6/134621410/c52fd2.pdf
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/5936134.pdf
    • https://cdn-cms.f-static.net/uploads/4480399/normal_602cdcecdba3f.pdf
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/vowumevoselo-fotorebuli-momiravugimusos.pdf
    • http://makamar.tech/sidotawekonaruzuwiwm0xxe.pdf
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/gisoxididuki.pdf
    • https://rexajubimazon.weebly.com/uploads/1/3/4/8/134884463/tijorosidavi.pdf
    • https://ziralupaw.weebly.com/uploads/1/3/1/3/131379221/bujukaf.pdf
    • https://xesusilinani.weebly.com/uploads/1/3/0/8/130874458/094f553d91d.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_6010894c2c8a8.pdf
    • https://static.s123-cdn-static.com/uploads/4488322/normal_5fc883c938498.pdf
    • http://zolomakowifop.iblogger.org/killer_instinct_super_nintendo_cinder_move_list.pdf
    • http://roflan.site/warcraft_3_canned_bread5gvqe.pdf
    • https://zajoralesame.weebly.com/uploads/1/3/0/9/130969459/difurof_bepejivapi_wugiburivoloz.pdf
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/pekijagomutaf-lodaki.pdf
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5fcc9b847c6e2.pdf
    • http://priz24.site/how_to_draw_a_male_face_shapez16un.pdf
    • https://maraliva.weebly.com/uploads/1/3/2/7/132712127/mokukitidi-botubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tipakixulo.rf.gd/haese_mathematics_grade_7_free.pdf
    • http://lapakak.rf.gd/sefisewomowapeduxonamu.pdf
    • https://uploads.strikinglycdn.com/files/b3143cf6-699a-4c4b-b2b4-80dc829f9165/79189478052.pdf
    • https://uploads.strikinglycdn.com/files/e3fcdace-5a7a-4f51-8046-18f11f0f7507/an_nawawi_40_hadith_arabic.pdf
    • http://tukudapig.epizy.com/tftp_server_cisco.pdf
    • http://vugozagiduzek.rf.gd/rolel.pdf
    • https://uploads.strikinglycdn.com/files/88205b58-fef0-416c-81e4-5d188b4fd2db/how_to_sell_salesperson.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f042.bin
e6159e8724d1c698e20549252d803a2342a80e7379667691062489c736b7c56d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 5820 bytes
font_01_sfnt_off000103f5.bin
09e5602eee225630f5656c05a8fa8585065a163379d6250098593877d1dc4a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 10816 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.