Malicious PDF — malware analysis report

Static analysis result for SHA-256 580ec4c4d4def069…

MALICIOUS

PDF

88.0 KB Created: 2021-03-24 01:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5286ea523e49d9f7c393704d65adc3c1 SHA-1: 5527b8da22f7c93d7b808510b9f1c15897084ad9 SHA-256: 580ec4c4d4def0692b209837110beb11220a8999a2a1bc0b152c01021ae2fa1c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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://maypoin.ru/award?keyword=additional+protocol+1+and+2+of+geneva+convention+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417528/normal_605a1b2d57f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fd36af88c5ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416653/normal_5fefdd662bafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_5fd1052ed8b92.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://uploads.strikinglycdn.com/files/8336e741-55d2-43fe-a76e-e6956010fc6a/how_to_deep_clean_leveluk_k8.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_9904c60d0e634713830d9887fdd416a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38907dad-5eba-4772-8191-b27f248d2b9f/57793447334.pdfIn PDF document text
    • http://vubixijugisoloz.epizy.com/34741147620.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_b797cbc0f78349b3aec3544741de87c6.pdf?index=trueIn PDF document text
    • http://giritinip.epizy.com/ranurolutapapozanepu.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_4feeac7381144b2789e9f16e37caf951.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee60898-2e5e-4348-8909-315950be28e3/3801527491.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_4bcd357bfba940e886933619ecf42832.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/angel_movie_hd_video_songs.pdfIn PDF document text
    • http://zufisad.rf.gd/92901878276.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_2230221ad6c247feb3f56c03188c3ad8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/density_equation_practice_worksheet.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_2e97dc40a72f4628b9ee121a71b2c15c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/canon_mp250_printer_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e175ab8-4c4a-4245-8113-2ac52d71f1d1/powered_by_the_apocalypse_rules.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_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 5164 bytes
SHA-256: fd34401455c923dace1342daf7cc614a57f7917b59fb5ffce17d1b0a55794bba
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10840 bytes
SHA-256: d6181fc3ca5c76bf1d3e388ea37b36ef1f9c938fe068499757b094dae139c0fc
font_02_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 16060 bytes
SHA-256: a1e2968ca8c7638dd4bef022e186f3fea2b098bc52bbc7b81535a6634822059c
font_03_sfnt_off0001447e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1447E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176