Malicious PDF — malware analysis report

Static analysis result for SHA-256 7690f26956a482d1…

MALICIOUS

PDF

85.1 KB Created: 2021-02-18 22:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3a005ab4e026de2029927f7233ab559e SHA-1: 42ae878aae455689de53f48af8c8563ddda54b23 SHA-256: 7690f26956a482d1788b9d6d4c6575cf0aaadcd996c9a7f32ce4ec7ce5e45026
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a remote-support tool lure, instructing the user to install or open such software. The embedded URLs, such as 'https://jottigo.ru/wb?keyword=how%20to%20show%20hide%20formula%20bar%20in%20excel', likely serve as part of the social engineering or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jottigo.ru/wb?keyword=how%20to%20show%20hide%20formula%20bar%20in%20excel PDF link annotation
    • http://bovafigirom.22web.org/kaneberirasojitegelanunom.pdfIn PDF document text
    • http://urolog.xyz/68121400497boqgh.pdfIn PDF document text
    • http://soguged.22web.org/arrayadapter_with_arraylist_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/2ELYwUx/3514568644.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/hdhfshg/klondike_solitaire_free_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/gcyCWTF/cube_surfer_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gifgiQu/xobawitukomigujopidose.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/ifjahhs/pubg_mobile_game_ringtone_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_601ab356a0617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirosisob/76756198930.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/teamviewer_chip_kostenlos.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/venutifap.pdfIn PDF document text
    • http://zubixuguse.epizy.com/92501339401.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/7036835796.pdfIn PDF document text
    • http://joxupabazifo.rf.gd/gekewed.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/alien_shooter_2_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/89263545562.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_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 5524 bytes
SHA-256: b2b20904a8550cdb6b53e13168e6b91832acdbf10e2dd1ceb1d48b84c28cf7e9
font_01_sfnt_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 11240 bytes
SHA-256: 6738710a67f1dc7fab2d88f1b8e250fb0bce46c7639c21b52a07f77ecd292c1e

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