Malicious PDF — malware analysis report

Static analysis result for SHA-256 328bb8e8907f0724…

MALICIOUS

PDF

69.1 KB Created: 2021-05-11 04:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9053e1a13c037164833197a330605b6f SHA-1: 51ebcea3763da1fb1c09d2f2574216497c6d0d97 SHA-256: 328bb8e8907f072416fc6efcb2236e958fc47b96951ba49038251f8541d864f8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/strik?utm_term=philips+gogear+vibe+4gb+manual PDF link annotation
    • https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/5889330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_60223d940d5e5.pdfIn PDF document text
    • http://fabimepela.22web.org/81634131619.pdfIn PDF document text
    • http://kixesisero.22web.org/51620277564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_60359b7797bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_6047eda498184.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/degofugezulumajow.pdfIn PDF document text
    • https://xunijududivajol.weebly.com/uploads/1/3/0/9/130969830/8f4a24b09d6126.pdfIn PDF document text
    • http://justiciaforjustice.com/249912041271db2p.pdfIn PDF document text
    • http://scarcebook.com/xosojas5spnb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_60216d5d7999b.pdfIn PDF document text
    • http://minozodatatinad.22web.org/39787883861.pdfIn PDF document text
    • http://myluckywin.site/xbox_360_controller_driver_windows_10_202019rfi.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/gaxogutokum_beludaxal_dimajalogifip_ziradagolaxirij.pdfIn PDF document text
    • https://gazonuzurixe.weebly.com/uploads/1/3/4/4/134485976/vezoxumonijaxup-jipab-bawodifoxokeris-tagedewufakiz.pdfIn PDF document text
    • http://tawabuzawi.iblogger.org/39237268039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/201803ac-136a-415c-b98c-fcbeb4e6ec99/dokirigagi.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_0eabc0b09b1f4fd7bb0c2274616719a1.pdf?index=trueIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_672bb6adcefe467c9ee48e14e8a411e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aeffefc-6785-4582-bc94-c796bbadc6cb/how_to_find_walmart_pharmacy_store_number.pdfIn PDF document text
    • http://wejajedotote.epizy.com/ruzix.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08E 5520 bytes
SHA-256: 7347c239f28c843d9fb6b2186aa79f20a3da8d97aabbd2ffbe4fe5b6d0c7c8d3
font_01_sfnt_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 10040 bytes
SHA-256: 2c5a5398fc25a7a27a7bc129f9c709c4ed3c6d9b8152fea209541c0afe599cbc

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