Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e002203b285f0f…

MALICIOUS

PDF

80.6 KB Created: 2021-04-30 07:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 01bc853bd2a7b264078a6d5a4a60a88b SHA-1: b94284c8187b5b54e3c9be745c40b928ece90225 SHA-256: 43e002203b285f0f9b90803f0cfb76f3af0946b6708919ddf3a03dcbec894991
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 0.9998

Heuristics 6

  • 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.
  • 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://vilenefex.ru/strik?utm_term=m-audio+oxygen+pro+49+manual PDF link annotation
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/jagexitamubowatasujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_600d5dd29fbfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_6016027a6bacd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5ffe8e71a3f15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_5ff9b9ddcea50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5feef17fae236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_603c1eca77399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451575/normal_6036841bbfd60.pdfIn PDF document text
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/2366403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486215/normal_5fc8c82ee24dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_6044956f5938b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_603e8e09413bd.pdfIn PDF document text
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/xulatitunuwitorowoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_82032d3948c6425d84a0a435f120eaf2.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_49a381f3e8b7482eb942f74e65e0c103.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_44b534f8b172477bbcc1764dd5772165.pdf?index=trueIn PDF document text
    • http://ladinuronabo.epizy.com/toliboz.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_776238d1c6934b3392b5cfff5fa5c4b7.pdf?index=trueIn PDF document text
    • http://malejuvi.epizy.com/a_streetcar_named_desire_set_design.pdfIn PDF document text
    • http://wupejubofuvom.rf.gd/ketorolac_adalah.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_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 5552 bytes
SHA-256: c2eb033ba93d1eecaffcf723fbd1ba813d16c8623be54ceda15a48a6adf41ee4
font_01_sfnt_off00010e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 11288 bytes
SHA-256: f9bb67bc87f5d898d0539250cf8bffb98f96d2bbdfe7b3cbf0e07c4be206bf03

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