Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa11238f54ff5ff5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-14 07:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7c857850326378b3d93aa8e360c66e6f SHA-1: 2375e26191799db3d1f7ff73f5fcf55b4d802c15 SHA-256: aa11238f54ff5ff5441f9a892bf67924d4e74932fa6c211b325329f8d1ef3432
226 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to various external websites, masquerading as movie download links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the PDF structure suggest an attempt to generate traffic or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/wb?keyword=badlapur%20movie%20%20hd%201080p%20filmywap PDF link annotation
    • https://jatekowi.weebly.com/uploads/1/3/0/7/130776123/17dc817f6ee.pdfIn PDF document text
    • http://raxuzogigegekaj.66ghz.com/32572091004.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/iKjgUjg/12770736932.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/7jcd2ji/6213931113.pdfIn PDF document text
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/kapukaduxa.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/ezw7gcE/vertical_runner_brecksville_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5fd7b1428dbf6.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/xubipoxeguza/jghggiU/fikasamuposusaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/jjjgiiy/xokibo.pdfIn PDF document text
    • https://cdn.sqhk.co/fomanazoravu/NgcmXt4/baloxokomolatofugitone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fe6e5559a04b.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/ChghjoO/dunk_lords_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/fenaziIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zawuzujuw.epizy.com/c_curly_braces_in_string_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/wanudawirogunadidoga.pdfIn PDF document text
    • http://ponogifivow.epizy.com/6874547601.pdfIn PDF document text
    • http://menivafanar.epizy.com/sijufasakurasonafukuloko.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/langrisser_ssr_equipment_guide.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_off0000d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 5796 bytes
SHA-256: 3d45bf6297b9c30072579f2c2ba3e03eb563caf9cfe166955158978646af195b
font_01_sfnt_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 11312 bytes
SHA-256: 157905eba71cbfff90f3f48a456355c896160af380ee55cc4888ebd8402861fb
font_02_sfnt_off00010f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 2684 bytes
SHA-256: c655fec132bca4e42abe89623a0fce6c786af620a6e6caae94cf141d85ed61ab