Malicious PDF — malware analysis report

Static analysis result for SHA-256 11698bfdbed7a640…

MALICIOUS

PDF

79.2 KB Created: 2021-06-06 14:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0f92ee1a490e36b228985160a06716c9 SHA-1: 99c75c041fcb928f8baead8d5be7b169f7a7e665 SHA-256: 11698bfdbed7a640a11efeb83cc750dfc61b7655a2735b9ab5d706f43fa73332
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to game instructions, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/pbw?utm_term=age+of+empires+definitive+edition+instructions PDF link annotation
    • https://jawavovamote.weebly.com/uploads/1/3/4/7/134748122/1e83c3.pdfIn PDF document text
    • https://pusakinadolelu.weebly.com/uploads/1/3/2/6/132682110/e3d331500b8a9c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483089/normal_606388bca9531.pdfIn PDF document text
    • https://jamaxukupabidi.weebly.com/uploads/1/3/4/6/134675967/sovubiwifire.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/vibusogojujoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_60b954beb4218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_6005e167b0bd3.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/dovinovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6017f684e389b.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/4132516.pdfIn PDF document text
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/fbed91aa39b63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_604424a42916c.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
    • https://uploads.strikinglycdn.com/files/815326a1-df2c-4598-a71a-602788b9158e/vukos.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/hollywood_movies_in_hindi_dubbed_download_free.pdfIn PDF document text
    • http://moxulolo.pbworks.com/w/file/fetch/144670842/god_of_war_psp_mod_apk.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/83297691246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357b8382-d991-4bf2-a8d1-ddf42fde4216/gukumurodi.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/w/file/fetch/144531840/phtls_9th_edition.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/gusukekubugimiwokekakonuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329221bc-bd29-4072-a4d8-9b3d1bb1f437/dajirawam.pdfIn PDF document text
    • http://zawepiko.pbworks.com/w/file/fetch/144549183/how_to_hack_roblox_2020_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd844aed-d7c6-411b-ad51-ed107d2c070a/roxakawiniwugejujazoju.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_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 5164 bytes
SHA-256: 614f4a0e9b3a2ccd75f48683039b90189b462407880bc0b7445025fd47276376
font_01_sfnt_off0000fcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD2 10600 bytes
SHA-256: fa60ff4ef0a980df996def2839b555d4a0c6196d8ac44dd681c2bb89cdaacc59
font_02_sfnt_off000120f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3