Malicious PDF — malware analysis report

Static analysis result for SHA-256 749c1af4f0ca6032…

MALICIOUS

PDF

77.0 KB Created: 2021-03-25 04:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b55dddba8288106525911cadff1fa101 SHA-1: 471cf218d5a97caa46a2b088ed3d33caa169b5d4 SHA-256: 749c1af4f0ca6032b62e2d89771fddb1de31ffdc0fe296048ca7e2075f6f822d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' reveals a significant number of external links, suggesting a tactic to redirect users to potentially harmful websites. The presence of embedded URLs further supports this malicious intent, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://maypoin.ru/123?utm_term=sasural+bhojpuri+movie+all+video+song
    • https://cdn.sqhk.co/gobuwovuv/yiTgdxF/tokyo_olympics_2021_volunteer.pdf
    • https://static.s123-cdn-static.com/uploads/4379379/normal_5ff2834a4c900.pdf
    • http://kulokozataxat.22web.org/avery_template_5163_for_mac.pdf
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/bupozedefizivu.pdf
    • https://cdn-cms.f-static.net/uploads/4383322/normal_604d36759524c.pdf
    • https://cdn.sqhk.co/rosomugimo/jgejf8n/71369486850.pdf
    • https://static.s123-cdn-static.com/uploads/4413110/normal_5ffd29071f6f2.pdf
    • http://dotasif.iblogger.org/academic_poster_design_template.pdf
    • https://cdn.sqhk.co/xegigujatefa/fLqsGgg/32535111558.pdf
    • https://cdn.sqhk.co/dodipenameki/XejgZNO/32048733379.pdf
    • https://cdn.sqhk.co/nesadatifu/hdjcLjd/bugagulawotigibe.pdf
    • https://cdn.sqhk.co/jawutuwek/YieGPGC/dragon_city_breeding_calculator_heroic.pdf
    • https://cdn.sqhk.co/lupobikud/g6ihjjs/73362586700.pdf
    • https://cdn-cms.f-static.net/uploads/4423148/normal_601d5ea4f1a33.pdf
    • https://cdn.sqhk.co/samekikogeri/hgxhiib/rocket_launcher_knife.pdf
    • https://cdn.sqhk.co/mezewimaxus/eOhbsoo/wix_filters_near_me.pdf
    • https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/kobodurijanu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gikikojumikobep.epizy.com/letekawirumuzabakaboki.pdf
    • http://vofiwevo.epizy.com/fovodejikor.pdf
    • http://rupilozomu.epizy.com/tukoxedewesupobawologugu.pdf
    • http://liwubujuwu.epizy.com/likatafunepumawiz.pdf
    • http://wutebanik.epizy.com/banner_editor_app.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_off0000ecfb.bin
08517d1dc0a6e0ca1b753c40f688fe6c7922ce6ee7483e0eecf482297b74a701		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 5752 bytes
font_01_sfnt_off00010066.bin
6cd2719efb15739a5ca1263da4b21646fe1ef060d8ee73b35c5520175d44805d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 11172 bytes

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