Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb0bc5ed7a165da…

MALICIOUS

PDF

73.6 KB Created: 2021-02-23 11:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: deb052040b7ba058aa7910dc82c04bec SHA-1: 23edce737dccd8150d5a2f0594674bb4e7ee75e4 SHA-256: beb0bc5ed7a165da984b88107cf794d29896aa108f1b887ee90e346c75a15b73
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/aws?utm_term=can+hedge+funds+beat+the+market In PDF document text
    • http://dubunidenore.iblogger.org/76927292953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_6019912907289.pdfIn PDF document text
    • http://tevubirufizibun.iblogger.org/math_clue_words.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_600dda24399b0.pdfIn PDF document text
    • http://magicwoolshop.com/solo_vpn_old_version_apk739kb.pdfIn PDF document text
    • http://twobigs.space/38440099568p5qe8.pdfIn PDF document text
    • http://brandframeb.com/windows_server_2020_free_tutorial2677q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5fedb273b6bc1.pdfIn PDF document text
    • http://japadalifu.22web.org/what_are_the_two_methods_of_mining_in_zambia.pdfIn PDF document text
    • http://toselarasomax.iblogger.org/ben_hur_movie_300mb.pdfIn PDF document text
    • http://lishop.site/zalusuxedekalijol3xrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_603032781f087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sezeludijufoma.epizy.com/35764208899.pdfIn PDF document text
    • http://funawazepepu.rf.gd/penije.pdfIn PDF document text
    • http://suregemebibu.rf.gd/android_phones_games_free_apk.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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5396 bytes
SHA-256: b6facb6c21f484826f60cbd9a0b6ea4f65164e530c6166044d1b13a6ec4df86b
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 11088 bytes
SHA-256: b2bae47af68a7a429a597cf743db0ec2c8edc28fb036e546e2424f2ed62f1d60