Malicious PDF — malware analysis report

Static analysis result for SHA-256 199ee30aa754a42b…

MALICIOUS

PDF

74.4 KB Created: 2021-03-25 06:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7cd50dc3d677ddc1660080eb8af2f904 SHA-1: 227dfded33b69311695c11fbfa5c05e0e0724757 SHA-256: 199ee30aa754a42b07ca446808e31bed06d8d91fd47a875ae3505add0fc4da30
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting or redirectors, suggesting a link farm or phishing attempt. The embedded content, though heavily obfuscated, is flagged by ML classifiers and ClamAV as malicious, likely serving as a lure to download further payloads or redirect to phishing sites. The primary attack vector appears to be social engineering via a deceptive document title and a large number of outbound links.

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://jumiwimov.ru/strik?utm_term=viper+alarm+system+reset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491936/normal_6019772d21132.pdfIn PDF document text
    • http://interbank.link/how_to_calculate_the_surface_charge_densitydu8ji.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/fivirozarivi-jogafemi-xujag-roxowalo.pdfIn PDF document text
    • http://rineset.xyz/speedway_puzzle_games_onlineodg79.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/didovumipopa_zinuwi_vejinesil_moniwa.pdfIn PDF document text
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/b1077e2.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/xadejevobudori.pdfIn PDF document text
    • https://narufana.weebly.com/uploads/1/3/4/6/134653256/d86010a1c0867.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/where_is_the_frigidaire_water_filter_located.pdfIn PDF document text
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/7421827.pdfIn PDF document text
    • http://kersita.space/tugisid0e9y1.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/ee87cdf450b6.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/conair_clipper_blade_assembly.pdfIn PDF document text
    • http://bepelisufozasep.mywebcommunity.org/fistulas_perianales.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428039/normal_5fe223a94b655.pdfIn PDF document text
    • https://gipumoku.weebly.com/uploads/1/3/4/7/134710759/1656293.pdfIn PDF document text
    • http://show-visitor.xyz/steam_link_pc_to_macxpusu.pdfIn PDF document text
    • http://masevetito.22web.org/dmv_audiobook_2019.pdfIn PDF document text
    • http://tacfitproducts.com/89008483359gg440.pdfIn PDF document text
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/patulewoxebabolepiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodexiguv.onlinewebshop.net/the_lion_king_full_movie_google_drive_english.pdfIn PDF document text
    • http://vevodulezetom.rf.gd/budget_approaches.pdfIn PDF document text
    • http://nabapuxamiluj.epizy.com/asathuranda_tamil_movie_isaimini.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE870 5032 bytes
SHA-256: f8904d8cc0b1e84800f88a1c4a889adae964bb842dbcee69c86a3b39f3087ae0
font_01_sfnt_off0000f982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 10068 bytes
SHA-256: 3f8f874ddaa770ed6097234d8f73248fa53d3b0cc069268bfbbda9d6c15d946c