Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1254bae08921ef…

MALICIOUS

PDF

73.4 KB Created: 2021-03-14 18:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ea991c86568221429de91124ac686a42 SHA-1: 52a9dd6c371dff107eed7b86b0fd376f874d356f SHA-256: 9b1254bae08921efac98ff1457c38956e434712f4b8342d01a39d1c8ff007c59
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://ponafet.ru/123?utm_term=st+louis+bar+and+grill+nutrition+guide PDF link annotation
    • http://jowitut.iblogger.org/dazikuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_341a3d8d196a46348550061312e485e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/69130538258.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/70596273300.pdfIn PDF document text
    • http://mebabafa.epizy.com/lamirudata.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/jajeguletaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/belapit.pdfIn PDF document text
    • http://xefuxatevu.epizy.com/kojokoludasudemeveto.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_53a2ad23e4624ddbb0eecdf0b1859e6f.pdf?index=trueIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_3b3fd1ee4b594bb3847e7ea117998c38.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_f2c69a204aaf46c3987d4f9ab28338c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e59193c-3e38-4f42-ad36-a8ab13953d04/how_many_quarts_of_oil_does_a_ford_focus_take.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/kizuxugiparilizilupopuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc149c29-997f-48fc-9ca5-03b0b7e1f82a/29654336144.pdfIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_ae3fc345b42d4ddcbff2f0eee9daf078.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_560788366c7d450bb42b55055a9ed0ec.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_a9b35d30178443a7b47fe73e1cd7a955.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_013b049ae7db421c8668c9dec2df88a2.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 5236 bytes
SHA-256: d95849738da9459fb793c2bec0f53350a76ec2cec75df6b5483ae4c45e2b69fe
font_01_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 11424 bytes
SHA-256: c276f3033ed213cfcea0f5ac0990616b8802ce5e65208e3ea72cbfe559a0293d

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