Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2349e2739abc13d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 02:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d4365f16d152a542e193f4376cc31594 SHA-1: 47ce80bf393b263b7b1f32970f4d117e6e8ebb4f SHA-256: f2349e2739abc13d920dcf47034b6739f453d17ecd7a6da5693da460d1befb71
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though heavily obfuscated, suggests a lure related to setting up a water timer. The presence of numerous external URIs, many hosted on disposable domains, indicates a link farm designed to redirect users to potentially malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=how+to+set+up+an+orbit+water+timer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5ffbc7583045d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5fdb1b50d49f6.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/9af496.pdfIn PDF document text
    • http://tryici.xyz/nagitatinipivu6xsie.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/xolidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fdd236213361.pdfIn PDF document text
    • https://bimuwalunamen.weebly.com/uploads/1/3/1/3/131384226/xunupawutaluz.pdfIn PDF document text
    • http://creditscorefix.info/sql_server_inner_join_left_join_performancemcc18.pdfIn PDF document text
    • http://polikarmonolit.ru/how_to_trade_using_forex_appdkoba.pdfIn PDF document text
    • http://lorenbayi.com/misojonixalavekov65ke.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/amazon_fire_tv_mirroring_iphone_freen4qjp.pdfIn PDF document text
    • https://siwurarililoto.weebly.com/uploads/1/3/1/4/131453181/2827891.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/fazagijubim.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/916e72a08fefc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fd842968051e.pdfIn PDF document text
    • http://pristav.pro/funur7ecz2.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/6678241.pdfIn PDF document text
    • http://dhl-order.info/pixel_car_drag_tune3032w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85b4b86-7773-4e5b-b07a-c138ba98c211/what_are_the_6_fundamental_elements_found_in_living_organisms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d752b5-fdcb-41f6-a19b-60f7f8702d2e/1074750248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91fb2b9-0762-49bb-8754-88bb1419c780/vtr_secrets_of_the_covenants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92c4228-9c88-4761-ade7-2457e6f0b148/14940704948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605487ca-6e4c-401d-9549-36249481fe87/71409267378.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_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 5124 bytes
SHA-256: c4caea55fa52053df92e6b357ef9cbca4b2b93b0e82995a87105618262a2d556
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 11344 bytes
SHA-256: 5edf9101d7c90178a7690d19202e0c98df250dacd83f5d03f76318f0766beca0