Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaead381121e078…

MALICIOUS

PDF

85.3 KB Created: 2021-04-29 19:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a336c651d85bf0092a0a943f6c88f934 SHA-1: d81d8b07d842d7edbc90b13d1d057ec808fbb59b SHA-256: ddaead381121e0782d85e2d8bd5f8f7e15cf4dcd3a6e2c12100fc4e17e8df7fc
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=moto+g6+vs+g6+plus+dimensions PDF link annotation
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • http://trynon.xyz/sawavesufvhe.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/ps3_ejecting_disc_itself.pdfIn PDF document text
    • https://ruzudewalaxuge.weebly.com/uploads/1/3/4/4/134497745/93b6eac4.pdfIn PDF document text
    • http://carbags.site/dyson_dc35_troubleshooting7o7nw.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/bitsat_2020_question_paper_with_solutions_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/d8hchgO/battle_heroes_medals_wot.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/alif_novel_episode_12_read_online.pdfIn PDF document text
    • https://fozumazajafipal.weebly.com/uploads/1/3/4/5/134588547/fudukevibokigoliw.pdfIn PDF document text
    • http://mon-compte-cmb.best/dell_inspiron_n5010_65w_laptop_adapter_chargerh3x1z.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/how_to_fix_a_leaky_water_spigot.pdfIn PDF document text
    • https://tubuzitobez.weebly.com/uploads/1/3/4/1/134108618/vojubobukis-xojilukeni-wuveba-bumufasu.pdfIn PDF document text
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/5152322.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/c55f07.pdfIn PDF document text
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/66559.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/194b5707600ed41.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/khbeAib/92169307337.pdfIn PDF document text
    • http://fumigatoff.online/cellular_respiration_summary_worksheetf5et6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibubatovavav.atwebpages.com/boone_and_crockett_mule_deer_score_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 5192 bytes
SHA-256: e3c900fd9c0c7a406560660fbee259668b7e8d5615a7fc93b175af34a09b5e3e
font_01_sfnt_off00010950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 12024 bytes
SHA-256: 78253a8ee87ab4965c2ff60b3a78dacb3ef73dca2a6edd0b1d927c27ecce2723
font_02_sfnt_off00013242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13242 16184 bytes
SHA-256: 89c208c5973a3c695bba959c66362a10f0c6c59a87e6967c78d3dea7ec8928c2

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