Malicious PDF — malware analysis report

Static analysis result for SHA-256 d958ba65ce58ed32…

MALICIOUS

PDF

69.4 KB Created: 2021-03-06 09:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e47e8476ad20ea75f992a57724eac7fe SHA-1: d08b1bdcb58f2f83e04fb7e18f0a56d5821939d6 SHA-256: d958ba65ce58ed3298af63d6c9ce11d4318756205b21b931b957c385c73c8449
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://resalured.ru/123?utm_term=2012+grand+cherokee+overland+value', is flagged as potentially malicious. The presence of numerous links suggests an attempt to direct users to external resources, which is a common tactic in phishing or malware distribution campaigns. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://resalured.ru/123?utm_term=2012+grand+cherokee+overland+value
    • https://cdn.sqhk.co/wagejino/gifjewD/gotabatul.pdf
    • https://cdn.sqhk.co/savageven/jNjjcDI/jump_start_a_car_meme.pdf
    • https://cdn.sqhk.co/kikolibub/xYhfDQg/lonogawoxuwewopume.pdf
    • https://cdn.sqhk.co/vekuzajomugi/ibrapWH/final_fantasy_7_remake_walkthrough_chapter_17.pdf
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/gagonozuluragale.pdf
    • https://cdn.sqhk.co/ditetijesi/q6gihj1/nulefijelujigumuwufukidom.pdf
    • https://mavakonagidesa.weebly.com/uploads/1/3/1/4/131483278/9034967.pdf
    • https://cdn.sqhk.co/xanodujijefu/EAx6giw/download_talking_tom_cat_2_mod_apk_terbaru.pdf
    • https://cdn.sqhk.co/xixujipum/fQjiRfu/last_shelter_survival_unlimited_diamonds_2020.pdf
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/8563c.pdf
    • https://cdn.sqhk.co/jutepoxof/cyNACgh/toxomusilipaxevuzugubako.pdf
    • https://cdn.sqhk.co/sugojipo/cicghhe/76201894131.pdf
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/zimuleli.pdf
    • https://kenojitoxudu.weebly.com/uploads/1/3/1/3/131383977/jofekuvaguw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_573a618441d8431fb3dccee5c67c212d.pdf?index=true
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_3ef8eebc0160436f82396be3643fde0b.pdf?index=true
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_e8dc102488ba44149cf2d975a9441b5b.pdf?index=true
    • https://s3.amazonaws.com/sosupejuxofedo/zanakufogerimegomel.pdf
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_3d70c6ebc3c145d9859844466a6c0772.pdf?index=true
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_5ae21563c02e493783e560c2367ef5d6.pdf?index=true
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_55497f5a3ddf4fdf9890594a4f69f921.pdf?index=true
    • https://s3.amazonaws.com/wokesabisevo/technology_business_requirements_document_template.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_off0000d09c.bin
9bf102e851081f2768b731608dbf43257c3f8805c987567969184663c202c10c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD09C 5376 bytes
font_01_sfnt_off0000e2ec.bin
ef1eca3f0c3bd8f3fd7f6969e5974beb35350d7c8dd6031b8e1726c4e8cbbe0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 10388 bytes