Malicious PDF — malware analysis report

Static analysis result for SHA-256 1caf8c8508e23ac5…

MALICIOUS

PDF

68.8 KB Created: 2021-01-27 07:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2e2c6b612856c416affd33862dd75b1c SHA-1: 852ec24323d0082deca626abf2f9b96552bcada6 SHA-256: 1caf8c8508e23ac5f5773233def20c2eb1f48302d586fd9c51e973b85b263c93
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/wb?keyword=best%20free%20ringtones%20for%20android In PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/1297368.pdfIn PDF document text
    • http://kebilosudo.22web.org/205317614.pdfIn PDF document text
    • http://dutuxagedam.66ghz.com/mowukugugik.pdfIn PDF document text
    • http://sodazetibup.iblogger.org/58930018150.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/jugejila.pdfIn PDF document text
    • http://mosuzovopij.22web.org/26969948152.pdfIn PDF document text
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/8162600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5fc92c834cac3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5ff609b4c0a72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovurafop.epizy.com/lowuwatunu.pdfIn PDF document text
    • http://lememisuxelivem.rf.gd/bajrangbali_1976_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/78550010121.pdfIn PDF document text
    • http://vorawaforase.epizy.com/dedatabijebutojake.pdfIn PDF document text
    • http://vokunewegulu.epizy.com/anova_sous_vide.pdfIn PDF document text
    • http://vanakodezifezuv.epizy.com/fullmetal_alchemist_brotherhood_opening_1_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/solve_equations_with_brackets_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/taratumavatekavifef.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/nisibisib.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_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 5092 bytes
SHA-256: bf424fe8e0ee51fdd016a28d51299277a6ab0bf2d8ebf78c73e98a0712cf67ee
font_01_sfnt_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 10496 bytes
SHA-256: 7e25744f13c9b3469fb05e63e10d8874471c610d98b439ddfc84d7fdb5df788a