Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d561d5cb4d3cead…

MALICIOUS

PDF

83.9 KB Created: 2021-04-12 15:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6cd074a7b35e40c2addc2f1afe325236 SHA-1: 7749b7aad83152a570c1c99b817ded6a9ea7e07b SHA-256: 2d561d5cb4d3cead7d95c4e4e4082e4bcde0c7238942a2fe123a60010833c1ae
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. The embedded URLs and the heuristic firings like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

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://ponafet.ru/strik?utm_term=does+wendy%2527s+sell+burgers+in+the+morning PDF link annotation
    • http://tipografiyav.moscow/run_and_shoot_offense_madden_19it01q.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/pesomekodomage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_5fec76bb8ce66.pdfIn PDF document text
    • https://cdn.sqhk.co/worekoxe/gdnaVgj/the_curse_of_the_werewolves_2_app.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/gokekubeg.pdfIn PDF document text
    • http://vizit.store/qualcomm_atheros_ar5b125_driverp88hs.pdfIn PDF document text
    • http://alfa-quest.ru/bootstrap_templates_responsive_w3schools8kw0s.pdfIn PDF document text
    • https://lefawiput.weebly.com/uploads/1/3/5/3/135324435/kamesotowi-guzanezuruped-tasezugume-jalaxu.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/gusavip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fc9bd6d157b6.pdfIn PDF document text
    • https://cdn.sqhk.co/rolizemixij/hgf9hb8/sefanokatepe.pdfIn PDF document text
    • http://pasetbs.xyz/xabugege6i0l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5ff48f6b0dde3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5ffa29a1eafde.pdfIn PDF document text
    • https://cdn.sqhk.co/kefofepobam/gdgjgdY/car_coloring_book_images.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/salario_de_um_agente_da_policia_federal_2020.pdfIn PDF document text
    • https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_bf9d590378dd4912b672bffcd7c307c5.pdf?index=trueIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_603c0698fa354116a48633f051a7fc60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/52364282109.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/rbc_capital_markets.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_65486fa2718b42d5b0d8a1e4cf5e278a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/city_university_london_bar_professional_training_course.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/how_to_fix_pressure_washer_surface_cleaner.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_082defa75d374d638b20118b062d6410.pdf?index=trueIn 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_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 4876 bytes
SHA-256: 7560237cdeedada841c4bad4877cd0f5587198caecb32374446c3f5d2eb90dd4
font_01_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 5396 bytes
SHA-256: aa5512455ec4afccde148642900121be3472ce28b3a24170c9542c04991320fe
font_02_sfnt_off0001189b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 11860 bytes
SHA-256: dc1d4b7ca38b17a96e1a899feab2fe5a471aef3e02bb13ae0c2cef53493235fc

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