Malicious PDF — malware analysis report

Static analysis result for SHA-256 f204178ac4038476…

MALICIOUS

PDF

68.5 KB Created: 2021-03-02 22:18:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ddc318d72cab9c9c6c0d49178053ead0 SHA-1: d3e75594577094741011147d6ef17aa32f7caeaf SHA-256: f204178ac403847631cca702e1818519c35b9e595c2cbad68f7b149645dbe796
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution attempt. The PDF's content, though heavily obfuscated, appears to be a lure related to online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=naruto+online+unblocked+games PDF link annotation
    • http://gexopidikimo.mygamesonline.org/90713336877.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/7Didrx0/92953660176.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/lekonurexodumabajaronazi.pdfIn PDF document text
    • http://badge-verification-center.com/kafizamuzofokerutusokw9xr.pdfIn PDF document text
    • http://antileqphh.site/70436706456joizf.pdfIn PDF document text
    • http://idealica-it.website/happy_birthday_audio_song_for_brotherlaji1.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/iiamyIB/gw2_super_adventure_box_2020_rewards.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/2ijpEu4/cheats_for_gta_5_xbox_one_guns.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/sofunosozuda.pdfIn PDF document text
    • http://rukozhop-guide.com/b._p._s._c_answer_keyvizi1.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/pibajuwi/podiveletegaxuzamufiposed.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/muresojerefo.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/baykon_bx11_user_manual.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/92433141704.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/rap_god_beat_saber.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/77173988527.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 5432 bytes
SHA-256: 286867125bb9bcc87619b29bb6abed168b4ab767fd90bb3e7bd4983b5df6081f
font_01_sfnt_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 9856 bytes
SHA-256: f46942cf1f0c8b0223e5926b4bebf0337ae80cebfe70e6ed9cb3ea0e4f6cefa7

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