Malicious PDF — malware analysis report

Static analysis result for SHA-256 266b7f35ea207eac…

MALICIOUS

PDF

78.1 KB Created: 2021-05-24 18:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e495cdec027602291043c0fbd018e5 SHA-1: 1faff74e72002fed0bf0df61b8e624c30cfd0a2e SHA-256: 266b7f35ea207eac2fa4f267b4d187fdbee9b4cdf81f762b853782c9d2fef03d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, characteristic of a link farm or SEO spam campaign. The primary URL, https://seumenha.ru/wb?keyword=fairy%20tales%20list%20disney, suggests a lure to a website disguised as a list of fairy tales. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wb?keyword=fairy%20tales%20list%20disney
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/vitamuxata.pdf
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/7737560.pdf
    • https://cdn-cms.f-static.net/uploads/4481157/normal_606841aa453eb.pdf
    • https://nozusetemakofam.weebly.com/uploads/1/3/1/4/131408546/2585878.pdf
    • https://vedatirujoxe.weebly.com/uploads/1/3/1/6/131606280/2288964.pdf
    • https://cdn-cms.f-static.net/uploads/4384145/normal_603ff1b4b8916.pdf
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/6d835735.pdf
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/pofapatobafi.pdf
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6052857bc9e7b.pdf
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/nilubi-daxezo-jajiso.pdf
    • https://pokeboxut.weebly.com/uploads/1/3/1/4/131437348/jokuji_jopukokoradop.pdf
    • https://sawuvuvexefiz.weebly.com/uploads/1/3/5/9/135964560/gapazatuxivolavowa.pdf
    • https://zedifetizigofup.weebly.com/uploads/1/3/5/3/135393349/xutojewas_rojetu.pdf
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/vefupojugodi.pdf
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/d2b151.pdf
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/3951062.pdf
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60349975b77de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tarizirefevifab/samsung_galaxy_s9_plus_unlocked_sprint.pdf
    • https://uploads.strikinglycdn.com/files/f78a16aa-dbff-4c82-9804-5949907ed8e3/how_to_find_long_run_average_cost_curve.pdf
    • https://uploads.strikinglycdn.com/files/d40072be-512d-4c61-80fb-48a2d977c3c0/70052706727.pdf
    • https://uploads.strikinglycdn.com/files/c52acbcc-33ee-488d-95ba-4f3e7b57e4e1/why_is_my_invisible_fence_beeping.pdf
    • https://s3.amazonaws.com/kelukakeb/wijutu.pdf
    • https://uploads.strikinglycdn.com/files/13e3bf47-41c2-4dce-a9d4-c1eab6b516da/almanya_trafik_levhalar_ve_anlamlar.pdf
    • https://s3.amazonaws.com/vudivuzakal/bipap_avaps_service_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d1.bin
b75a09cdf67be2d1f0b1256a1a144834a1d0441c434e1144dbbce43d4c426325
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 4876 bytes
font_01_sfnt_off0001067b.bin
8a3e02fd66ce7694619fdf340861b0de3387ef3dbc3e0d3ec736dda7035eb297
pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 10764 bytes