Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2f56c078bcd745…

MALICIOUS

PDF

75.0 KB Created: 2021-03-06 14:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9cec78917029ea7109430650a727adad SHA-1: 0f2f3d59f1384e8883656243ce9ed37afce63d4f SHA-256: 5e2f56c078bcd745ae981f884dfae3d63a60742015df016b9831dfcde8ad86f3
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://fokemale.ru/award?keyword=yamaha+moxf8+88-key+synthesizer+workstation+manual PDF link annotation
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/d62b06d5cc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fc88fabc1dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449001/normal_5fd83e7077cfc.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/74650806507.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/fjd0CC8/puresixuzisuxojidizel.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/7126179.pdfIn PDF document text
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/a3dab5c148.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/82053727640.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/ejijgeo/52926369426.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/mabilefukix.pdfIn PDF document text
    • https://lulotileja.weebly.com/uploads/1/3/0/8/130873917/kezeteb-nupivebojibut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_601dd4ccb83cb.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/bPHidjd/survival_battleground_free_fire_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/IKwicyV/85452596195.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/ZZ59bQQ/dutibozosabaxopeze.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jeuiaV4/telugu_audio_bible_new_testament_free_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/ijcVXji/followers_app_not_letting_me_log_in.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/b30feaee-dc8e-47f3-a7c9-a56bd205b7e2/xotatekevamumogot.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/jukovufewenuzefilutit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7a0838-e9de-4cc3-b8ac-e1347e08765c/how_to_apply_decals_to_model_cars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18f8cea-a4e7-4df8-8b9b-075a91bcb321/rodamix.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/braun_thermoscan_manual_6013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9da2c4c-4dee-45bc-971d-846a982b892d/punopivisexokifeso.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/reinforced_concrete_pad_foundation_design_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030f79f4-885c-45a0-970b-ebb4365aa941/que_lleva_la_metodologia_de_un_proyecto_de_investigacion.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_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 5452 bytes
SHA-256: ddf79ffbc909043cacf31aa4b43d4a2112e76e76dc7995fcf8403e7e430781ba
font_01_sfnt_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 14176 bytes
SHA-256: b9b845a8f1c1e7c4f1b9f39ab294936f6b5a53bd792e16e45ad6301197a4adb3
font_02_sfnt_off00010ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3