Malicious PDF — malware analysis report

Static analysis result for SHA-256 118958fd5d77e2af…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 21:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4a21730b85fa6e9439fbb48117f9950f SHA-1: c6719b45771107007e1f4a8a4fc062cd25e9e51d SHA-256: 118958fd5d77e2af37980a3ebb6d503c21575babe7729911dcf9214c67d83f8c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a game walkthrough. The presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=feed+us+pirates+walkthrough PDF link annotation
    • https://webemibas.weebly.com/uploads/1/3/5/2/135298215/bamadubijen.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/igdhghd/contact_lenses_color_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/ijhfiaE/10025509211.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/hbhhZid/rewiwuranujuvuvozoguxemo.pdfIn PDF document text
    • https://zibiputuwe.weebly.com/uploads/1/3/4/8/134886395/5039615.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/emjd7sF/mawaf.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/gonifenanar-tomumanon-tapabuwupifak-nigadiz.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/jbNBi0l/kobe_and_gigi_in_heaven.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/vVRCGic/sowurenexupujiwusuve.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/hg4hhoy/dj_los_dol_versi_baling_baling_bambu.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/bqgcMgd/civil_war_surrender_april_9_1865.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/gif1Zha/lurufebokuzurasexu.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/kB4hewX/tuludidogopisajezilugepux.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/bc37790e8.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/hcVVh5K/best_friends_in_the_world_friendship_test.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/gjgV4jf/moxodabokutapogobiwerota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_f1fbc82b041f4d9384769839b8c5470b.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_138712c7bbc54bb49cc53fcab4fc624d.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_6a7e28f2a2df4aefa06b5f9b90090d47.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_e0fa6fd664dd432b867afd98754372f3.pdf?index=trueIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_157d514a363b472cbabaa0791d566a9a.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_cc30a141d3c34d92bf199cc44ee8ec31.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_a7fe1fb34eb34bfb940827cbc9b19cfe.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_c159163f6e044916bd280df377492a51.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010c65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C65 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5332 bytes
SHA-256: 9b6b238d8b183ef4d1fc6d9562b908d1b9229a8568d5b0248416583f0bc58200
font_01_sfnt_off0000e9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B8 10044 bytes
SHA-256: 8a0d7504dc916f26cb436682defee96f08ec40b17f201597e8ebfb856bb3cd57