Malicious PDF — malware analysis report

Static analysis result for SHA-256 5164996d5273d1cb…

MALICIOUS

PDF

86.4 KB Created: 2021-05-12 06:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a967c5820be6fa7eeaaf1cc830a4190 SHA-1: 9bd98b0006d17c412ac49b767e1bb5d41ef89139 SHA-256: 5164996d5273d1cbb35484a13d56797327128b39d67355940cc47247874c947d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=what+is+demo+mode+in+sony+tv PDF link annotation
    • https://jetijejage.weebly.com/uploads/1/3/4/3/134319548/856831e31.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/vowoxudekijapohuk3i.pdfIn PDF document text
    • https://kipujoguburaza.weebly.com/uploads/1/3/4/3/134321983/kujujasuwigazop_nuxanajewobobed_jaxiraxivutuk.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/ee5762.pdfIn PDF document text
    • http://instapresent.site/nomawaxit7bhs.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/gupiros.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/zusafopukasade.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/zidijagapin_bujeti.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/fofimowasexutapuvese.pdfIn PDF document text
    • http://differencecheats.net/povebusomabavotabeso7lpyr.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/mibirape-gojasamafuxunix-miwuragonujo-saxokepamewir.pdfIn PDF document text
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/7908626.pdfIn PDF document text
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/5631033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_7069c7f176e94aeba776fb4d2e32fd10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c3d966-dfe2-496d-b0de-cc5178cd5930/what_are_two_basic_differences_between_dna_and_rna_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8861b96f-8b72-49d6-bb6f-69c482cac2cc/20916852430.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_d87bc2079a5f44c5848ab220bfb526cf.pdf?index=trueIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_98e825baf5474c6fa2121f9ae60d2e2c.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_2aa54572500442ce85a672acf0d4917d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bef407-d2d4-441f-a9b3-f9bdbb694302/economics_principles_and_applications_mankiw_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf11a1a9-273a-42ab-9cf0-6d9c72db7ee7/how_to_do_slope_intercept_form_perpendicular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2aa3f5a-9d8c-4ac6-ae4d-733e4d2762f0/24831859570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888fd880-6268-4128-b82f-7f6419272e69/how_do_you_screen_mirror_on_samsung_smart_tv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 4900 bytes
SHA-256: bdd51107c35e8dcff13fdbd1abce2c22d3c7c9fc2401e534acd8d459bd54123e
font_01_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 11292 bytes
SHA-256: 77256ea64de33a2205c76aeee4ec225570d06732a71d3fa6935c107ed54960bc
font_02_sfnt_off000127a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A9 16844 bytes
SHA-256: 2a7dfb8ba17be4fc9d42fc07ddf3655914c0eeb3b47541ac6ab3035220c0d2e8
font_03_sfnt_off00013dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f