Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac453b62fae414f2…

MALICIOUS

PDF

94.3 KB Created: 2021-03-10 15:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 21bc27f9acc1a434de4afb8bf7184568 SHA-1: 098e5cd974dbe5199f6270bad888acff20935cde SHA-256: ac453b62fae414f2994445a7ad51bef3e03a81630595409a38ea285f9b79261d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though partially garbled, includes keywords related to a government application form, indicating a lure. The presence of ClamAV detection and ML classification further supports its malicious nature, likely as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=pradhan+mantri+awas+yojana+gramin+application+form+pdf+in+malayalam PDF link annotation
    • https://cdn.sqhk.co/tuseliwi/Zej9jjN/numironoseseja.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/giwobixakikekorim.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/icY1Nif/street_fighter_4_mod_apk_offline.pdfIn PDF document text
    • https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/f8049ca435219b.pdfIn PDF document text
    • https://zasufademebarav.weebly.com/uploads/1/3/4/7/134737005/genojuvitazek_xamof_sipijuzikaso_labovununaze.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/iiKLO0J/posejebo.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/BoMhcNc/push_payments_visa.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/15464346580.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/marurinewuro.pdfIn PDF document text
    • https://bibokesoxi.weebly.com/uploads/1/3/4/8/134850131/4528077.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/idiicgc/simply_piano_mod_apk_ios.pdfIn PDF document text
    • https://tonudekosinin.weebly.com/uploads/1/3/4/6/134685286/9474828.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/tanususugiw.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/69b289ab1.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/vjhhgdK/cnc_tool_changer_types.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/pikenajelufiru.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/yhhhfjh/ai_programming_with_python_course_drives.pdfIn PDF document text
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/basewamesis-kudisuwolomede-zezenulawamitop-nedidedox.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_0492cacb8be741f988423255047442ea.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_2579dc589f9949b4b6fa06f1577d6bea.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_d4faa0bc91a44147a58b7550f6bd9130.pdf?index=trueIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_775ce6c7ba754d12ac7fd76cf22223fb.pdf?index=trueIn PDF document text
    • http://sukokovevaz.atwebpages.com/pasaxomitoz.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010b44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B44 19668 bytes
SHA-256: 1539c96ad184add0fffb3b361044824249d7a34247b75ef82dc27ca22625a6c7
font_00_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 5840 bytes
SHA-256: 518edfa401818298f4addcd94eedec65f075faa0892cf5c29b9553ee631e5571
font_02_sfnt_off000146c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C8 10504 bytes
SHA-256: 9c8e623b34715d6dcb4505fc30126ec453afb31bbac90028d4a66cf002b8ca4c

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