Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8560e8e76d4221f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-16 15:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46cd147fcf93f78a76c58b9f12b87032 SHA-1: d182e071156e781b7e7969afa05fe8431d76e861 SHA-256: e8560e8e76d4221fb8d7ce92b348c6608b304325862698be2b26e2bbd25fdbee
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection scheme. The 'SE_INVOICE_LURE' heuristic indicates the document may be attempting to trick the user into clicking a link for payment or a promotional code. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=boards+and+beyond+promo+code+september+2020
    • https://cdn.sqhk.co/jadepibake/jjhr3aI/racer_underground_mod_apk.pdf
    • https://cdn.sqhk.co/xipepovivik/b8T1Rhc/fuburukepoxuzetexev.pdf
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/bodot_filodarorom_nexozu.pdf
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/larine.pdf
    • https://cdn.sqhk.co/tosuwukiwate/bNhcXje/gameboy_sp_ebay.pdf
    • https://cdn.sqhk.co/gujowaxexag/3iavXji/bonojodofakusomebubi.pdf
    • https://static.s123-cdn-static.com/uploads/4414852/normal_5fccaa527e74a.pdf
    • https://cdn-cms.f-static.net/uploads/4450430/normal_6025c39bd3181.pdf
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/6814555.pdf
    • https://cdn.sqhk.co/jugemito/jejaMhg/save_the_puppy_from_the_angry_dog.pdf
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/goteriwuje.pdf
    • https://bovojopo.weebly.com/uploads/1/3/2/3/132302970/lexemoki_mulizasej_xigup_tevanad.pdf
    • https://zokuxupan.weebly.com/uploads/1/3/1/4/131412362/semitabinekison.pdf
    • https://cdn.sqhk.co/sibamoxa/oSRgggi/lifeb.pdf
    • https://cdn.sqhk.co/jefutubup/ViifSic/forgotten_realms_wiki_gods.pdf
    • https://cdn.sqhk.co/kubasovusi/mrjhhdy/java_tutorial_ppt.pdf
    • https://xirojanolaxoz.weebly.com/uploads/1/3/4/7/134723589/suwinek.pdf
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/be1c5695f.pdf
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/molaxixerowemajeb.pdf
    • https://xuwojuzo.weebly.com/uploads/1/3/4/4/134471705/9519252.pdf
    • https://cdn-cms.f-static.net/uploads/4446399/normal_600c3789530df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_d7195a95993e43968f19e2784444c15a.pdf?index=true
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_0b327c706efa4a70b6dadedab52f53b0.pdf?index=true
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_a3065f9dce794ffd836948e9713c019d.pdf?index=true
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_4d8a6579405b4398b3110568f0dd30fa.pdf?index=true
    • 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_off0000ef45.bin
d4d26f662306f06c970b60a96bf768d09139ceed8295b80d4bcf72236b14d592		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 5752 bytes
font_01_sfnt_off000102c9.bin
faa455e5d8f4631b443f9bfd831d916187c7b80679ba84c5b23d9e48156f2c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 11188 bytes

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