Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dab7b811d998c15…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 17:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 86e37764bacddfb9e3e8211eb1b9f133 SHA-1: 0751203268dacf28346b9b0dad39ba28877b710b SHA-256: 0dab7b811d998c15bbf273468219e9eef5dece5fbbe9422fbd5a04e7ad3f1a5e
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=happy+new+year+2020+moving+images PDF link annotation
    • http://tamakedesununod.mywebcommunity.org/alabama_abortion_bill_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_602795496331e.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/7241886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fc645ff21.pdfIn PDF document text
    • https://siziloxa.weebly.com/uploads/1/3/4/7/134747516/7079fe8a0ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc735bab6002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_6002ec83782e5.pdfIn PDF document text
    • http://zuzatew.medianewsonline.com/bediwigunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379613/normal_5fe2cb948aba1.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/q_see_camera_customer_service_number.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/xisagukilamowi.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/pobixedele/bujowepalebeki.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/animal_world_map_free.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_181ddc4dfa94404aac940c91f986b4e0.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_1a4e114519944f83be847e984ec4647c.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/98276566865.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_f6ee41a20d2c45da88ee1f98863b4965.pdf?index=trueIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_445827d52c7f4f1c9fc4b8fb3db4fe17.pdf?index=trueIn PDF document text
    • http://gafodix.myartsonline.com/gikip.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_17d96881cdd7429baa34fc1355620acc.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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 5596 bytes
SHA-256: a631271c1c725e4ef78eb262def2cb61f69f241879b3f23399a97ccb3f0e5c2b
font_01_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 11216 bytes
SHA-256: cfbdbc9cadec82a4a7889af021a0a56b2bf9308dc7dbaa836f86f7b6d7918b2d
font_02_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90