Malicious PDF — malware analysis report

Static analysis result for SHA-256 210f2c0c062ce765…

MALICIOUS

PDF

78.2 KB Created: 2021-03-13 19:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fcd5a4d1071dabaee2366d11ce39310 SHA-1: 206db95873fa8a8919d7f86469bdd680c9fb879c SHA-256: 210f2c0c062ce76529af1534802811e7e0c322242e4d30fe87685e39939a0a8a
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to appear as legitimate search results for 'ap exam schedule 2020 pdf'. The primary malicious URL identified is https://ponafet.ru/award?keyword=ap+exam+schedule+2020+pdf. The presence of a link farm and the ClamAV detection as Pdf.Phishing.Trojan strongly indicate a phishing or malware distribution attempt.

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://ponafet.ru/award?keyword=ap+exam+schedule+2020+pdf
    • http://icily.xyz/what_is_the_quotient_rule_for_radicals0s2p9.pdf
    • http://trokot-shopnew.online/880258403904i8we.pdf
    • https://cdn.sqhk.co/tutabalero/bidmjbz/jufijejalubomimewibogipe.pdf
    • http://zolepop.mypressonline.com/87471785891.pdf
    • https://cdn.sqhk.co/wepiwuvume/jh3ylhb/hd_camera_for_live_streaming_church.pdf
    • https://cdn.sqhk.co/joduragenep/dx4mtja/dwayne_haskins_contract.pdf
    • https://cdn.sqhk.co/fumazuri/MCjbwLe/57129170053.pdf
    • http://bcpzonasegura10beta-viabcp.com/-wxog1.pdf
    • https://cdn.sqhk.co/zowajomi/fhijhjd/foxuwoj.pdf
    • https://cdn.sqhk.co/mugukawi/cZBdgiW/xifamu.pdf
    • http://vizazovabula.mywebcommunity.org/pharmacotherapy_casebook_answers_9th_edition.pdf
    • https://cdn.sqhk.co/sadinuko/ZIahf56/fujipewajigorozavema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sopexalibip.onlinewebshop.net/elisabeth_badinter_xy.pdf
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_322616c0531e48b0a6ce7486b9eaed51.pdf?index=true
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_00b1ca4f1ec146248126543046e952c6.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_4e32689a8ac9411a9900a68803c14c0e.pdf?index=true
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_3b34751b28bf4c80b3e7ef352418b58e.pdf?index=true
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_c9418550b45940e788e138e5139728ac.pdf?index=true
    • http://fuxunowelujuxa.atwebpages.com/30805273453.pdf
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_02f7b0d76c214d9fbdbbe4db526994b1.pdf?index=true
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_e334d262fade49f8beb2e3203e984c3a.pdf?index=true
    • http://nabafutig.myartsonline.com/cateter_venoso_periferico_calibres.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_off0000f180.bin
c4a80921c51e619397553cfd4ab97cc366dad14ca203d648065d3253b8972e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 5632 bytes
font_01_sfnt_off0001048d.bin
499a092ad7afd0d3dc2d7d95e34777f50ce1bff16f8004f9f34cf0b0df38599e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 12076 bytes

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