Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cee5a58e047b10…

MALICIOUS

PDF

90.1 KB Created: 2021-06-02 14:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6975c79093181220706b7e3bd181b2d8 SHA-1: 10b0b943ea4942a3e011d1e963ea6ca33ffcd9e4 SHA-256: e5cee5a58e047b10c87fe01f53192da212f670b2e9cbd622ccd883eab9977098
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 0.9992

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://chcial.ru/pbw?utm_term=among+us+pc+mod+always+imposter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428035/normal_60613022b0fb5.pdfIn PDF document text
    • https://mojilizide.weebly.com/uploads/1/3/1/8/131857690/xinatopo.pdfIn PDF document text
    • https://xutebaso.weebly.com/uploads/1/3/4/6/134631295/kofefakaziriza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fcc0c55c9530.pdfIn PDF document text
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/4392116.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/137938.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/jazebelup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5fea087ac5ed0.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/gizosexaloxi.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/xidajosimarite-minobawapas-zaragomotidebu.pdfIn PDF document text
    • https://woperuxotuxolo.weebly.com/uploads/1/3/4/8/134849923/1908422.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/pepagoson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_606c7a5f320c5.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/zigabasete_xavagenoguzo_jaludolifi_lafofotebufumaj.pdfIn PDF document text
    • https://tekovotobu.weebly.com/uploads/1/3/5/3/135319939/104920.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://uploads.strikinglycdn.com/files/1ced93d8-00fb-49cb-9686-dec51d2d30c1/96270924296.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144412056/vobobevedotikire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385cedc9-78ad-4861-bbb1-17ea7513bb04/fefututotoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5520a115-e69f-4f3d-a1d9-79881e251287/pukesukejojejelupitezida.pdfIn PDF document text
    • http://feteselulo.pbworks.com/w/file/fetch/144470664/81644984030.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 3712 bytes
SHA-256: 58ed36aecaa6a0499b13f77569e970ff558f2c03fe96f238d2d184f536b3c5e5
font_01_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 5460 bytes
SHA-256: d5ea48aa4a9f5cb070b41fe477f3a923ef46e5b9aafaafeeec408384063e1b83
font_02_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 17152 bytes
SHA-256: 801ace6dbf9fbdc5f6b82f5b91532f0ed62ff1d0c54b01fdf905db27e6ff480f
font_03_sfnt_off000135af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AF 16060 bytes
SHA-256: a1e2968ca8c7638dd4bef022e186f3fea2b098bc52bbc7b81535a6634822059c
font_04_sfnt_off00014a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A40 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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