Malicious PDF — malware analysis report

Static analysis result for SHA-256 e804bec995720dae…

MALICIOUS

PDF

75.3 KB Created: 2021-04-02 12:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6c6e198a8a70cda3622bca51ab71e8ba SHA-1: 5580b5a0084e3e065ed945a45729b1dd64ef11cf SHA-256: e804bec995720daeb4ac5f8e6001d7a7015c4bcf3ee349584f89b192bd27e6c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=beautiful+splash+screen+in+android+studio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fea296a5bca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_60600caccb0f1.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/95961550200.pdfIn PDF document text
    • http://depusapo.mypressonline.com/8657447499.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/16079653212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_6010b0da17958.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/40201402000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_6045ea5be9f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_60590c934cafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_602d697e7b0f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5fd7871f9f9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_603a5b88b2a6d.pdfIn PDF document text
    • http://paruxezogu.mygamesonline.org/filum_rotifera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/falejogajir/ponun.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/todijizodi.pdfIn PDF document text
    • http://mixonal.epizy.com/bringing_up_bebe_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/movewu.pdfIn PDF document text
    • http://menesakuwi.rf.gd/33721880175.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/97966578417.pdfIn PDF document text
    • http://fapisab.rf.gd/39424972906.pdfIn PDF document text
    • http://lupugavediroz.rf.gd/binorod.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/18712705979.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/leriponepalisesologuxuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 5292 bytes
SHA-256: e61c32c4eca98852917905e882829aec369e22888574408eeda2a8891fec6ff7
font_01_sfnt_off0000e4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A2 10916 bytes
SHA-256: e5015fbc92da4d7327f153c1e2016d76289167df5829503415e8314636058a4c
font_02_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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