Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc906d1c16c27a78…

MALICIOUS

PDF

92.0 KB Created: 2021-03-17 16:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b12168fedaa8cbce7e37f5ec28d23e9d SHA-1: c352ec3359050d2ecad0a445c14c8144aba394bd SHA-256: dc906d1c16c27a78e4ef9a2d81c7ca9cdec8c9e59515cc3c3f17ed4ed59a6367
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to host malicious content or redirect to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to the Uttarakhand flood to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=uttarakhand+flood+2013+information+in+marathi PDF link annotation
    • http://usesucre.pro/lusozogibunanozasujobetoyyw8k.pdfIn PDF document text
    • http://ro-shop.space/38650555576stqte.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/listening_fairy_tales_stories_in_hindi.pdfIn PDF document text
    • http://oneitstore.info/kafimamipulixobiv1ackr.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/5783953507.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/7DghAhj/23792798986.pdfIn PDF document text
    • http://boevoenlp.com/tefal_pressure_cooker_aunatgi.pdfIn PDF document text
    • https://cdn.sqhk.co/fexiseme/V3ifsVm/83012737294.pdfIn PDF document text
    • http://nerroba.info/lozokutoxakuba94q7x.pdfIn PDF document text
    • http://podarokinsta.site/18516373072kf0z8.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/iuSqQbi/virus_deaths_history.pdfIn PDF document text
    • http://xozonline.ru/ponakox1vgew.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/hDjiDif/kufanenukudekinegogoxivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_8c131fb148d6427e8d41f12bfd6dbc85.pdf?index=trueIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_7f13d1064afd427ebe254479a7753d6e.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_24c6166e73fc4141a613a74e2dbbd916.pdf?index=trueIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_18fffc75fbb84659b183615125b06c40.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_1eec24a5eac24fb8923403b02b25801d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D1 5516 bytes
SHA-256: 8485c9a415271e17af9f79747eb59767db58c436eda5a27ccafbb2b5f01e8110
font_01_sfnt_off00012675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12675 11108 bytes
SHA-256: 5210df12b53a7eb2de050bd93c9a43c46e304c4424ce07c813d34f17242f665a
font_02_sfnt_off00014cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDB 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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