Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c88029677e28248…

MALICIOUS

PDF

74.7 KB Created: 2020-11-11 22:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d6fa7ded7940d30b790257e6413e2fec SHA-1: 14c149c329fef133882780ba6c074cc25fe5368f SHA-256: 2c88029677e282488b33c9b1c8b5e55c9396c62e109632d63698999a899db2c8
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 0.9996

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://trafffe.ru/123?utm_term=crop+pdf+acrobat+online PDF link annotation
    • https://juboxunogaruf.weebly.com/uploads/1/3/4/7/134700559/7603210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5fa870cbe279c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5f896131547f3.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/lekupiwuxo.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://dapamokosow.weebly.com/uploads/1/3/4/3/134337633/3737b0e6873.pdfIn PDF document text
    • https://letenusesek.weebly.com/uploads/1/3/4/3/134310332/5003425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f90c6b81866a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_5fa746f2da78e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccceaca-549f-4e10-91ed-16386346d5a8/pokemon_glazed_reborn_download_gba_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ad3430-8f3f-4b9a-a311-163cc82ea7c8/88169612530.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/temunifasunibolopopasalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67c8641-d2a8-411d-ae19-aac33eeb1ed5/fiforilalonesojagidi.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://www.gnu.org/licenses/gpl.htmlIn 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_off0000cabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 3044 bytes
SHA-256: e76926900de4e0a1e3fa40214beeb2da5fe1f6d242b5911e4eeded1fe374096d
font_01_sfnt_off0000d59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59F 5016 bytes
SHA-256: be2977e7fa8545204df079ea19660682f6260e2471256a91fd8b4210b721cd5b
font_02_sfnt_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 5920 bytes
SHA-256: ae9fcd29b807c25b1e08a846f700a7084c17c262bd9a210523bb364901116e27
font_03_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10656 bytes
SHA-256: f46cb55b2b0e9deba70b10cdab8a2157e5f51e0780dbbcd98b220f3b2009df5b

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