Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58f15e8d2582168…

MALICIOUS

PDF

77.9 KB Created: 2021-04-25 16:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 04fe84e1024e213cd3362b008d034986 SHA-1: 0a665ed8cf0c3a511099687a2bd669403c0c4b01 SHA-256: e58f15e8d2582168a1a5c5afec69754f60b1badd241166f10b9cc3931611da0f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, with one prominent URL suggesting a lure related to 'bassinet instructions'. The PDF's structure and embedded links point towards a link farm designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=arm%2527s+reach+co+sleeper+versatile+bassinet+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5ff1b3899181d.pdfIn PDF document text
    • http://teachost.com/chicco_keyfit_caddy_stroller_framexcy5d.pdfIn PDF document text
    • http://crysety.xyz/hp_envy_4500_connection_error5eer5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_602745943c0e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366987/normal_60041706d05d3.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/LgjifS9/93301425845.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/AQhchhJ/cat_simulator_animal_life.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/19330078813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5ff86226a8047.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/retoxovenu.pdfIn PDF document text
    • http://mkr-olimp.info/belt_conveyor_load_calculation_design36x97.pdfIn PDF document text
    • http://bitsracing.net/61637640440uhtk5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fda584608f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_600bced61fbe7.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/kokile-tatowaxubuda.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/6Kha4jd/bleach_mobile_3d_character_tier_list_2020.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/dell_precision_m4700_webcam_driver.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/13334354087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_6013afad8fb27.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
    • http://noxumalog.onlinewebshop.net/bread_maker_recipes.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/71054404447.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 5280 bytes
SHA-256: da6f9085ab48b05df0432d915718abd28f4826da91d70c930717b73f28956271
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 12636 bytes
SHA-256: 865585c07c9e061857a0169f30df6ad34bfddf0fccc3b7bfef2fc9687ade46d2
font_02_sfnt_off00011b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B65 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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