Malicious PDF — malware analysis report

Static analysis result for SHA-256 72731a2f8ec46d4d…

MALICIOUS

PDF

68.4 KB Created: 2021-02-26 13:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d32e3fed45bba75a3d2440cf0c4bee50 SHA-1: 711096ea8b27c5bddb86658227f932844f49f9c6 SHA-256: 72731a2f8ec46d4de5087834e1189e3a23bec3b2dbf32cce37e1821f3761898b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=physical+science+crossword+puzzle+answer+key PDF link annotation
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/luguwujaduxexosuf.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/94514825999.pdfIn PDF document text
    • http://vbnmcxz.xyz/9apps_install_2018_apk31na8.pdfIn PDF document text
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/76ba6686650.pdfIn PDF document text
    • http://gratoramaa.space/android_studio_requirements_ubuntugf87x.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/7950426.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/vibukexiros_bewalet.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/6515818.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/wapoz.pdfIn PDF document text
    • https://latuguno.weebly.com/uploads/1/3/1/6/131606113/tofunu-josupenoja-mimiguvebu-nuxogulafifewo.pdfIn PDF document text
    • https://ganunosor.weebly.com/uploads/1/3/0/8/130814229/vuwedaxopevej_sabedava_woxaloka.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/8545210.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/tajuxomezowi.pdfIn PDF document text
    • https://cdn.sqhk.co/dosovejozeb/dghrgij/photo_editor_app_android_studio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/why_is_my_washing_machine_not_draining_the_water.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_off0000cef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF7 5472 bytes
SHA-256: b196c1b490e572c42b0751abb2db677aa698d26efc27ac9d68fae1fb545b8535
font_01_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 10084 bytes
SHA-256: 29d89e4bff547bda57e871ffe0495b4bab150c0be0d5c3504ff856d3f0549fa5