Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0672f4becd166ac…

MALICIOUS

PDF

78.8 KB Created: 2021-04-23 12:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f76e8192423fb2bb4ccb6891772b646 SHA-1: a0cf017d888fad1478db3baa4cd77f5ae8ad8044 SHA-256: f0672f4becd166ac8bbc6cc1f9fd0eb72a82b4358ca48616a0b8c63f2d5d959a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to iPhone backups, directing users to a suspicious URL. The presence of embedded URLs suggests an attempt to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=how+to+backup+iphone+on+mac+catalina PDF link annotation
    • https://cdn.sqhk.co/zoturisa/jgZgiJH/jegenedadozowipa.pdfIn PDF document text
    • http://opt05.ru/604015824967maqq.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/icgcih8/space_programs_all_around_the_world_lyrics.pdfIn PDF document text
    • https://lugigotaxur.weebly.com/uploads/1/3/0/9/130969655/gomone.pdfIn PDF document text
    • http://shopwithsale.website/denunikufwezm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60449fa85fe09.pdfIn PDF document text
    • https://tuvopezape.weebly.com/uploads/1/3/4/7/134712323/bufamenoxaj_rilededega_lumofev.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/jhQauXg/summer_acrylic_nail_designs_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sugojipo/4jijgjg/verizon_text_messages_website.pdfIn PDF document text
    • https://pabojigu.weebly.com/uploads/1/3/4/8/134862721/zefalajurosi.pdfIn PDF document text
    • http://help-business-media.com/718565476815kxpa.pdfIn PDF document text
    • http://hq-cleartv.info/156902041yndvx.pdfIn PDF document text
    • https://cdn.sqhk.co/lopedovev/ibGxefx/21469330467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501231/normal_601810c0cb70d.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/e500d97f-d2eb-4961-9864-a5ccc6c73d2a/76957113123.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/the_chemist_stephenie_meyer_series.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/koneru_ranga_rao_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349cc8fd-e945-42ab-82ed-021d8b7d09d6/kupovemasowusivoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75a6084-367b-4b64-bfda-f44185c0bb1a/59753446330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84df1e25-def0-4b6b-be86-abd45e6197c6/will_there_be_another_hunger_games_prequel.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/jimufiwumuresakub.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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5156 bytes
SHA-256: 489bc2615a70dcd1d06eaf8c70b9e1e023cbd7b222aa2433243f4ed990e511c9
font_01_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 10984 bytes
SHA-256: 0a7713a87feae9c8fd69c79ba4945f5b6a1a418eb879dd5989c67ae897abb3b1

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