Malicious PDF — malware analysis report

Static analysis result for SHA-256 90414094636c31a2…

MALICIOUS

PDF

111.4 KB Created: 2021-04-29 17:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e00cc97ad6d551809b6c89e97aa34747 SHA-1: da3c8e1b64ee7772046a1b1f260580fc0928a6c7 SHA-256: 90414094636c31a23d20f74fc188856265dbd242436cf8d9641cf2d80324bb5e
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-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=evinrude+etec+g2+service+manual PDF link annotation
    • http://samyog.ru/xirinamabxqoro.pdfIn PDF document text
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/bebosudezap.pdfIn PDF document text
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/4731420.pdfIn PDF document text
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/5922376.pdfIn PDF document text
    • https://jivefumo.weebly.com/uploads/1/3/0/7/130776755/2430f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6065e269a6d1c.pdfIn PDF document text
    • http://petrol-v-pol-price.site/60862796051c5vk7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff34637be568.pdfIn PDF document text
    • http://lerob.info/livexapuvewebetujemazixakm0mmc.pdfIn PDF document text
    • http://sbrf.link/craftsman_16_chainsaw_carb0vvjk.pdfIn PDF document text
    • https://tomolipuxoris.weebly.com/uploads/1/3/4/7/134708775/zafiliwujomumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_600a3dade2337.pdfIn PDF document text
    • http://dkblogin-de.com/wipupugim8ysd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_604ef6cc822b5.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/032b8654-b2e6-49ab-8441-8a5007d35d95/49781021469.pdfIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_d3af05620ede481a87b18519a98b14f8.pdf?index=trueIn PDF document text
    • https://bd5e8a39-7345-4d1c-b933-e8ec171ec4b0.filesusr.com/ugd/2dab9e_641a0a5fec724b859d015de07b7c72f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bdb62c-6a36-4259-a348-4049ec399533/95359073442.pdfIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_70f1024cd7cc426ca992e5f0fe513c3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b383b385-2384-4035-bf3d-8b58d322a02e/honeywell_rth6580wf1001_installation_manual.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_2cd84631ec2a4748a9f28e20e10b4f8b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1770B 5408 bytes
SHA-256: 3bf56e5db215ccdd4e9194562e933e8918631b6fa855c1a9527232d74d3cb793
font_01_sfnt_off00018969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18969 10832 bytes
SHA-256: 76e4acb73a80ee9e9f6a785e538c2b31f1932727489ed76cbc7d33099d71b6a1

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