Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d1f2733f662a87…

MALICIOUS

PDF

104.4 KB Created: 2021-04-25 01:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fac78e5282f602a9ce85d9c432e3c237 SHA-1: 49c5677e18478f011519049162916593f2281036 SHA-256: 24d1f2733f662a87f62d9ce0183654096d472d1b95f79b91a24c603f0be21a51
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to popular search terms, suggesting a lure to disguise the malicious nature of the embedded links. The numerous external URIs point to a link farm hosted on disposable domains, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=attack+on+titan+season+4+episode+3+last+scene PDF link annotation
    • http://sutovuresas.mygamesonline.org/sabupib.pdfIn PDF document text
    • http://stnold.com/jukurubixoladamepojop56.pdfIn PDF document text
    • https://jipaxebuperiw.weebly.com/uploads/1/3/4/7/134751602/jogasifolanotup-nikem-nadamoju-lalel.pdfIn PDF document text
    • http://xedebebagilaxeg.22web.org/biology_11_textbook_download.pdfIn PDF document text
    • http://puragofivirafux.iblogger.org/golf_buddy_aim_l10_voice_rangefinder.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/blood_type_a_diet_plan.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/ao_smith_commercial_water_heater_warranty.pdfIn PDF document text
    • http://samo-katim.ru/financial_shenanigansxsxrq.pdfIn PDF document text
    • http://fruitslope.online/69751901687sd1nq.pdfIn PDF document text
    • http://riwuveroxuwox.66ghz.com/nolubepafalenifajazer.pdfIn PDF document text
    • https://tijogarukaro.weebly.com/uploads/1/3/4/7/134710746/duzudowidu_gikafuvofe_zesowipuz.pdfIn PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/jenodipis-xudut-tasubupegerev.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/tiwomigobupu_fodirov_jemef.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/09a5966b12942a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fogafixajusel.rf.gd/below_her_mouth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/842228a6-4e24-4e8e-a1ff-6427c426dc94/vokiw.pdfIn PDF document text
    • http://xugekevilop.rf.gd/dielectric_properties_of_nanomaterials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a7bdc8-0e5e-42d2-889b-5d2ae277dc1f/9265827222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501be07e-719e-4fb8-a056-303627209848/tetufusosoteme.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_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 35520 bytes
SHA-256: 4230b850f80caed302c02aa3bfc14b93e917fd4d8e600906c7afb5ab5fc34fff
font_01_sfnt_off000159ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159ED 5276 bytes
SHA-256: 9cf37a16aa7925c604c109f122ecd6f8a0ef0fd03dee5656dcc68af5e2c67904
font_02_sfnt_off00016bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BFF 12088 bytes
SHA-256: 69f5082a1f3092cbf6db252a44e49329518cdfe85d0d8a3ac33dc9a1debce2bb

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