Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff064aa22369ca67…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 20:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3aef8e22edffb1bf6d3ea94fa334f7e SHA-1: 2cd5ce5e8a806bc686b682ccff822a98f0ed9768 SHA-256: ff064aa22369ca677e7e7e5528ed0fc68170ebb1069b095932316236422935a7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate documents. The primary malicious URL identified is https://xajibur.ru/123?utm_term=american+lottery+application+form+2018, which is likely used to redirect users to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/123?utm_term=american+lottery+application+form+2018
    • https://cdn-cms.f-static.net/uploads/4421215/normal_6044bb59325be.pdf
    • http://lulelege.iblogger.org/zijaronesowuwuvanipevik.pdf
    • https://mirijanonukuzo.weebly.com/uploads/1/3/2/7/132740352/2622260.pdf
    • http://kivikevakefum.22web.org/vafotomubojiwosujasotawar.pdf
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5fdd2f7d58265.pdf
    • https://cdn.sqhk.co/lekixubegewo/4hgGGif/godox_tt350o_guide_number.pdf
    • http://narixuz.mypressonline.com/62992710455.pdf
    • https://cdn.sqhk.co/gidufulelav/3iahbOk/cure_in_chinese_language.pdf
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/jogovejevavibiri.pdf
    • http://joriwolujuf.sportsontheweb.net/lisaz.pdf
    • https://cdn.sqhk.co/nezerozara/giCijgf/vumupafadofuxi.pdf
    • https://cdn-cms.f-static.net/uploads/4462727/normal_606101c1142db.pdf
    • http://viwimewi.22web.org/arksen_3000_psi_pressure_washer_manual.pdf
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/bizudomoxatid-gozefebipej-numekikotipum-zuseboxojifute.pdf
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/edb8740fbf8f4.pdf
    • https://zutumageru.weebly.com/uploads/1/3/0/7/130739253/norowe-kopetakutod-galanilipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_b6d71c63692a44c9b11421267d143b3a.pdf?index=true
    • http://bofetotazefonuv.epizy.com/97043763783.pdf
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_e5f7370848f74d72b743630a56aa2146.pdf?index=true
    • http://milebulijulami.onlinewebshop.net/98139566757.pdf
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_0ab620b915c248d48a75b70a3b964c0f.pdf?index=true
    • http://vofegut.epizy.com/12158408344.pdf
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_e41e04e735264e0d898708f4482066ab.pdf?index=true
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_0b18430f0404481fa2f04a70d0e11afc.pdf?index=true
    • 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_off0000ee49.bin
f59f09bacc51150b1edca38c211b823e1ade913f890a2a8f63b7d3ee8a1988d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5596 bytes
font_01_sfnt_off00010157.bin
43eb06b284760860611fb206f9485037a68a5cf0551217570d109188ff1aa9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10157 10936 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.