Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54aec5fbbee4ef3…

MALICIOUS

PDF

78.7 KB Created: 2021-03-11 01:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e5ec8f73acf94b7170d178df872a1125 SHA-1: 3ba8a4a85a3c8578c277f526b3b664a04eb8bf21 SHA-256: a54aec5fbbee4ef3ff2fb01a54c9a27972e24324bea8926f2b8fc08a340705c1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/wb?keyword=william%20blake%20the%20lamb%20and%20the%20tyger%20analysis PDF link annotation
    • http://pifafuvutote.iblogger.org/vojonawizi.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/how_to_clean_a_proctor_silex_coffee_pot.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/ferezikazap.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/jolugo.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/memakal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_60198b482fdb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_6015778ab986a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_6008b1a6e3189.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/49752750100.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/hd_movie_kabir_singh_in_720p.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/fixusumup.pdfIn PDF document text
    • https://sulewana.weebly.com/uploads/1/3/4/6/134605909/dijiwisozifo.pdfIn PDF document text
    • http://savekawiki.iblogger.org/cateye_urban_wireless_bike_computer_installation.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/lezopobigeza/voxabegiranokegegijer.pdfIn PDF document text
    • http://mojozore.myartsonline.com/13401370073.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_a01320dca7a64748b15517556cb9efcf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/kolexumegizologasobamidiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/prism_minimal_powerpoint_template_builder_free.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_1d61354f66fc4f8e899ceabf814b4c2d.pdf?index=trueIn PDF document text
    • http://buvodomugefun.rf.gd/nodunegufoxisuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/xuxilelitezafubotaladew.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/canada_states_map.pdfIn PDF document text
    • http://gazosaka.epizy.com/samsung_a10e_unlocked_firmware.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_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 5556 bytes
SHA-256: d11ae6f2f90f63206b43ec514d9e31f9ff66b000d3380a66fe1ec7aeab12ef8a
font_01_sfnt_off000108b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 10676 bytes
SHA-256: 0b9ac9a599a0d27ce5a6bfce0689cf134588a9b86585edc01436931bb5b220b4

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