Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf7a1607848c0f1…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 17:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2ecd8ada5abe5c55a2849d6c9cb3b118 SHA-1: 8bce79c30ac995f21b82d686df6289bacffcd3e7 SHA-256: ddf7a1607848c0f15bf58532d9e8be4568d5655d1409987a43bf355956cb35ef
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary suspicious URL pointing to a disposable hosting domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a missing game information guide.

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://dugedepap.ru/wix?keyword=beginner%2527s+guide+gameinfo.txt+is+missing PDF link annotation
    • https://cdn.sqhk.co/kidurukazag/iaUujji/download_game_fashion_story_mod.pdfIn PDF document text
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/8911770.pdfIn PDF document text
    • http://rabota-plus.club/vifonebii2jek.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/Dicxijo/mp3_audio_player_pro.pdfIn PDF document text
    • http://drilltech.info/kasemeguridesosetuz02gq.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/nixubis-mamigudo-gunat-juxipazuxif.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/Llhezig/losevenasaviz.pdfIn PDF document text
    • http://gmetry.online/xorogigujomub4ahbv.pdfIn PDF document text
    • https://baponejivo.weebly.com/uploads/1/3/5/9/135986917/xasimobiwa-wavalo-wadofab-dirofolimufov.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/eijAjgm/topeluwatego.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/mamibis/id_card_template_free_illustrator.pdfIn PDF document text
    • http://tubiwebixepin.rf.gd/modern_dollhouse_furniture_1_12_scale.pdfIn PDF document text
    • http://kimekidagi.rf.gd/kedugito.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/88062728261.pdfIn PDF document text
    • http://damusoborubumo.epizy.com/antithrombotic_guidelines_chest.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/cunto_mide_una_hectrea_en_metros_cuadrados.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/54462276786.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_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 5380 bytes
SHA-256: 11c69cd8d887352918da21ebee1b967ddd60dfb0d16cb1d32cf5f53db5462fee
font_01_sfnt_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 11208 bytes
SHA-256: 5a4915bc7b45cbfef44c9f92952940eb16b8898af3736d3e74f7116981bfa71d

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