Malicious PDF — malware analysis report

Static analysis result for SHA-256 f882271eefa51534…

MALICIOUS

PDF

82.9 KB Created: 2021-05-16 08:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ffcd974eff434f19be8af1dcb9cd6df SHA-1: e6ad20191db31b6887c91823d897dc88c6b37e0c SHA-256: f882271eefa51534cbff946cdf88df6d8fbcbd5dc2433e41e63797e71fb5b380
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 0.9990

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://pelibifir.ru/strik?utm_term=dell+latitude+e7450+cmos+battery+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6064349d57bcd.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/a5e9311169.pdfIn PDF document text
    • http://juilopkiretlo.ru/wuditubuv09m7.pdfIn PDF document text
    • http://stonersfranchise.com/rivozosogutasajozofele7wj5m.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/55390172033.pdfIn PDF document text
    • https://robivobaxo.weebly.com/uploads/1/3/0/8/130873737/6bf5fee95571d6.pdfIn PDF document text
    • https://sonadenazutimiw.weebly.com/uploads/1/3/4/6/134654654/vakizebedemawuxufoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_600b3bdd6c5ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_605128b26f1d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fcf6f03b73ce.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/75556292676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_602c8ffed86e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jaxunukologefis.onlinewebshop.net/15014943461.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_4bcaf9f87e544eccb2ebdc2f606fb0cf.pdf?index=trueIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_d7be822756ae406cacb534ee11e393a5.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_b3a6557f413b402e9c38d40174ceb253.pdf?index=trueIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_2a0f6638892a4cff988e7cc62b269fd9.pdf?index=trueIn PDF document text
    • http://zibevili.onlinewebshop.net/43232705893.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_40d030b911b94e589b19f339afef67b7.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_caa554e2d9c347e6b0e91389e7ef8d5b.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_b5623ff59ce4419ebe02397b2be3478e.pdf?index=trueIn PDF document text
    • http://pizitibasowu.atwebpages.com/ribikarefumowakikijipe.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_b0210e91e2504dcc964f82db23c1c66a.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_fe362e3ba71b4ab19c3216571b956490.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5776 bytes
SHA-256: 8cb77924865953ffb8300f670476ce035c2122126fbee4bef9a85e3450206e26
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 10472 bytes
SHA-256: 778b2824f2be4ecf22e8f926d1bc8c7aa770e7b88e420fd25c2f3191f2ba745d
font_02_sfnt_off00012fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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