Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7e543f2be60759…

MALICIOUS

PDF

83.3 KB Created: 2021-01-14 11:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ce92670271119101fca7416bce5a839 SHA-1: 02a1b2598d2ef9e3ced24d874af569416bed52b8 SHA-256: 8d7e543f2be607591c36883f29244a5397e995a40ce7f98586a27b771d658c6e
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 0.9996

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://trafffi.ru/aws?utm_term=free++uc+browser+apk+for+laptop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471464/normal_5fad871113f28.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/KhhLKBy/61016758621.pdfIn PDF document text
    • https://site-1198644.mozfiles.com/files/1198644/39014473270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5ffba17b5c9f6.pdfIn PDF document text
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/pisusade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fa5c6f9c86fe.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/pilozuri.pdfIn PDF document text
    • https://sevujamipoviku.weebly.com/uploads/1/3/4/2/134234740/e1438bdca750.pdfIn PDF document text
    • https://magudutetu.weebly.com/uploads/1/3/1/4/131437318/judegifiwidefow_vopif_junuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f9b990a6f83d.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/3jgfz60/windows_3d_pinball_space_cadet_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_5fc3084c45ca7.pdfIn PDF document text
    • https://rawadawopi.weebly.com/uploads/1/3/0/8/130874142/dolejanimef.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
    • https://s3.amazonaws.com/zulezov/jemog.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/pharmacy_online_store_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/joxapumoxe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 4988 bytes
SHA-256: 1c4a741cb2f2fe73a9daebdaf8485e23856a924508e0209e6800f9e707b57e30
font_01_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 11856 bytes
SHA-256: c7f8a2ce0e015c03cbfd9618cf63b7b1d1e34df1dcc9c6330379da78dd6252db
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off0001314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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