Malicious PDF — malware analysis report

Static analysis result for SHA-256 980e5d8a2630833f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-03 13:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f577eb4e5f434c53aec0fd9901d105f0 SHA-1: 7520cc5776f0322da4cb697d99cafce24114cb24 SHA-256: 980e5d8a2630833fadddb78c3a64466bb15bc4e539c26795b288d0bed1519496
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits multiple indicators of malicious activity, including a critical heuristic firing for brand-impersonation credential phishing (Netflix). It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the final phishing destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a fake login page via embedded links.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/5583261.pdf.
  • 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://jacksth.ru/wix?keyword=gci+alaska+cable+guide PDF link annotation
    • https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/5583261.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/xorofufovotimitedup.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/Dihvfib/southern_illinois_police_scanner_frequencies.pdfIn PDF document text
    • http://xeporivol.iblogger.org/manual_taller_suzuki_bandit_400.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/wKmghjh/45408224487.pdfIn PDF document text
    • https://fanejutasoja.weebly.com/uploads/1/3/5/3/135399707/wewij.pdfIn PDF document text
    • https://xigolomo.weebly.com/uploads/1/3/4/4/134483438/goralipotip.pdfIn PDF document text
    • https://vibisorimujeke.weebly.com/uploads/1/3/4/3/134344086/c01159dfede95.pdfIn PDF document text
    • https://lepomanorep.weebly.com/uploads/1/3/4/8/134856804/c5759.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/HiiihYb/contract_killer_sniper_mega_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/jZvLhcY/dibowedufuxatiwepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lafuworukegi.epizy.com/26329585821.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/burger_king_menu_prices_2020_sri_lanka.pdfIn PDF document text
    • http://luselobek.epizy.com/lumbar_drain_management_clinical_guideline_series.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/how_much_do_chick_fil_a_employees_make_in_texas.pdfIn PDF document text
    • http://wabufugolo.rf.gd/pibejinabasokakesexaluze.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/55167712090.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/everytime_boy_pablo_sheet_music.pdfIn PDF document text
    • http://lujajali.epizy.com/hanuman_chalisa_song_kannada.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_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 4832 bytes
SHA-256: c6ccb766ab718404b927dea38e1a629aec57a81528e75237fc0513dcf95434c0
font_01_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10428 bytes
SHA-256: 9fb9ad3342d7d6c2a787010db9a7aac556d78b5de7e6ed973ec24f1de5488ce8
font_02_sfnt_off00011a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333