Malicious PDF — malware analysis report

Static analysis result for SHA-256 897f68fd5483ca18…

MALICIOUS

PDF

81.3 KB Created: 2021-03-15 20:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 077db83679e23734bef94f9b127fe708 SHA-1: 496816359915477c1b8d175d4f4291b853214eb6 SHA-256: 897f68fd5483ca1893f015607b21f738e8c30079d73ea9721f818480a36011ff
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/wix?keyword=one+plus+one+book+pdf PDF link annotation
    • https://cdn.sqhk.co/mosepoxik/diaiije/nunisajapimogikogapopilof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_603f19b8ac08c.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/iibwSoN/piano_tiles_blackpink_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/jMhjfez/tumblr_light_wallpaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5fca941368dfc.pdfIn PDF document text
    • http://bevamifugidujew.scienceontheweb.net/alta_via_3_dolomiti.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/30886408404.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/fZXHmBh/bamon.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/ihfhiic/wood_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ohahhie/call_of_duty_warzone_ps4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/jhLMhct/official_orange_gamecube_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/bie9hib/63303741555.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/lhr3jjY/super_bikes_phillip_island_2021.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/nibisigidex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_6010813224e4a.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/how_to_get_free_family_law_legal_advice.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/Ggfgejf/17218439692.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/autocad_lt_2021_new_features.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/3ieicR1/bcg_share_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a54ba24-fa70-4888-8d4f-f96ffdb6a654/45262344602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6bc814c-573d-4597-a278-9cb9c17740e0/ganugex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4434b8f5-6e49-4459-94c5-ea3ece1f576c/bissell_proheat_2x_revolution_pet_wont_spray_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d903a1f-eb74-45da-aea3-6cbea736796c/wimpy_kid_movie_after_dog_days_123.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_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 4960 bytes
SHA-256: 737647a57b4b1711912e2a6d3ecefb24a1cbe1bde6c3db1a589246d39f4f01d9
font_01_sfnt_off00010f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 12056 bytes
SHA-256: fa3283c6f4ee924fdcc6af8f4a4df1113d5570ded71dd7fa337e14c302e845a8

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