Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9274f2b9f69876a…

MALICIOUS

PDF

88.2 KB Created: 2021-06-08 10:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7e465fbfb57949ec889d5872a3f6946a SHA-1: 501f8b651217afcc6d6e3638783993864acb4dfe SHA-256: f9274f2b9f69876ac1841b217974cf69a01677929652692a766e496178799a42
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://garglob.ru/pbw?utm_term=la+razon+de+estar+contigo+libro+completo+para+leer PDF link annotation
    • https://namukizup.weebly.com/uploads/1/3/4/7/134748015/5560778.pdfIn PDF document text
    • https://ratipixudaxixix.weebly.com/uploads/1/3/4/4/134472160/baseno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6017a4eae394f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_6040e4444a2ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_6016a6be7d96d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_60244afc5c518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_6040397a523dc.pdfIn PDF document text
    • https://mixufatinir.weebly.com/uploads/1/3/0/7/130739404/3148520.pdfIn PDF document text
    • https://ritobawen.weebly.com/uploads/1/3/4/4/134486043/2373872.pdfIn PDF document text
    • https://gufevetiginuz.weebly.com/uploads/1/3/4/6/134626386/vimarevumus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zawepiko.pbworks.com/w/file/fetch/144546540/erb_isee_practice_test_middle_level.pdfIn PDF document text
    • http://zexowisam.pbworks.com/f/how_to_value_us_silver_coins.pdfIn PDF document text
    • http://podimil.pbworks.com/w/file/fetch/144802227/mepulamoguvelukuzejir.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424515/8937322884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791fe309-8da5-42e4-8904-ae0253680d0f/hearts_of_iron_4_millennium_dawn_1.7.1_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a521182-7300-432d-838c-8379d38b2271/pillars_of_eternity_2_strategy_guide_download.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/f/meteor_hitting_earth_2022.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144505119/67729420175.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/w/file/fetch/144509481/do_they_die_at_the_end_of_the_notebook.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/f/1694146583.pdfIn PDF document text
    • http://mosijiv.pbworks.com/f/jezubedad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f4db54-6f84-4260-b7be-14cd9e160b39/29051324456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4035d6cf-254c-4650-9047-f1a87b763ef5/relion_confirm_test_strips.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/w/file/fetch/144794478/teoria_de_la_personalidad_conductista_skinner.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 5524 bytes
SHA-256: b358d828834303a530bcd3187b42e087c4ad5be4464f06654332a5941cecc7a7
font_01_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 7172 bytes
SHA-256: a0fd49454d84d8d01eadc6a99841603d44ea4d7ca7a93f44a21ba3f87d6ecafa
font_02_sfnt_off0001285b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285B 12788 bytes
SHA-256: b5c1a37b28a9606a2b99b3602e829b29f18128c79e0dd6755bdfe2d3e687ce34