Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a7464bada474c3…

MALICIOUS

PDF

78.0 KB Created: 2021-03-16 03:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6bcbee034052c3bbce6c4541451ae6d2 SHA-1: 916ada5fb0a2332708d42b0e225da202d383883b SHA-256: 48a7464bada474c3e6cc20985614275103d9be0c0dca7a731d4b7147f48358c6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as an external URI leading to a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a malicious intent to distribute or phish. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=clutch+in+gear+but+wont+move PDF link annotation
    • http://ndfnasg.xyz/el_nombre_de_jesus_acordes_pianon9tyh.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/winerur.pdfIn PDF document text
    • http://covidcapsule.world/6176880395o9g14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_603f873518aaf.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/coagulants_and_anticoagulants.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_6049ef1b68879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_6008cf378c5b5.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/vimogofikowep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459939/normal_603aee53b2be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_6046e943535f1.pdfIn PDF document text
    • http://greatmasters.biz/913973961169v7wz.pdfIn PDF document text
    • http://kimugifogetami.medianewsonline.com/is_cyberpunk_for_ps5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/bpsc_answer_key_2018_prelims.pdfIn PDF document text
    • http://xekofelix.rf.gd/waroxilerifidoxobi.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_07cf8d2ec25040bea1622fa84b994202.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/kobunifomofevidum.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/42564307428.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/kufumo.pdfIn PDF document text
    • http://sakogabutal.onlinewebshop.net/70820326090.pdfIn PDF document text
    • http://titopamut.epizy.com/problem_solving_approach.pdfIn PDF document text
    • http://velumosak.epizy.com/how_to_set_time_on_nixon_unit_watch.pdfIn PDF document text
    • http://pidukuniwid.epizy.com/apple_watch_hermes_watch_face.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_60d862cff6a444569dfac55caaffcdaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/dvp_report_for_baja.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_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 5232 bytes
SHA-256: ace1e2f41ee3b574bd1e85f1d20fc1b02d5cdf83a49f3890d98bd50f57bb9ad1
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 10780 bytes
SHA-256: 33c70cc3d54f58bd3a24d8593089a7c932128b9991d34ad210f9380e6ddac0e5

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