Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a19721b9cc93dd0…

MALICIOUS

PDF

83.5 KB Created: 2021-02-14 03:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 26b5f79f73be0300fe9924f04672bb69 SHA-1: 90bdf4123ccf2f51991fab1670c6e779b8ef3545 SHA-256: 4a19721b9cc93dd09e20889fa2dd6019fb5516233b1b6f3f65eb88d6e00f9d00
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=pet+sematary+2+parents+guide PDF link annotation
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/zadilazanilafa_ruwem_xodawive_nujuzoro.pdfIn PDF document text
    • http://kepovimobezozo.iblogger.org/sfg2_mod_apk_3._8.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/9315d5.pdfIn PDF document text
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/4048708.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/gcyCWTF/cube_surfer_online_unblocked.pdfIn PDF document text
    • http://zuwujamoruwipam.22web.org/51626408701.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/bofixiw.pdfIn PDF document text
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/a2c2a8c83d.pdfIn PDF document text
    • https://velineninebag.weebly.com/uploads/1/3/4/6/134608195/dimozi.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/2343528f54b07.pdfIn PDF document text
    • https://terusabul.weebly.com/uploads/1/3/4/7/134702655/5872254.pdfIn PDF document text
    • http://dobomepederu.22web.org/xujosedaxipiwewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gusutawidike.epizy.com/invoicing_template_south_africa.pdfIn PDF document text
    • http://xupikilagi.rf.gd/beaconsfield_high_school_sixth_form_requirements.pdfIn PDF document text
    • http://rojapamun.epizy.com/achyutam_keshavam_song_64kbps.pdfIn PDF document text
    • http://tuvojiteziw.epizy.com/cisco_webex_room_kit_plus_installation_guide.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/how_was_checkerboard_mesa_formed.pdfIn PDF document text
    • http://mewozegi.epizy.com/magixovasogujaxive.pdfIn PDF document text
    • http://sazosubegus.epizy.com/counter_strike_1._6_2017_hd.pdfIn PDF document text
    • http://luremanoxe.epizy.com/cat_exam_2020_syllabus.pdfIn PDF document text
    • http://kaluzepo.rf.gd/mekik.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_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 5480 bytes
SHA-256: 23ed3a18eebd393f03ff49a6f9512726960fa0c7b661fdf614025c58ad98ebce
font_01_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 10488 bytes
SHA-256: d5ecd8748a5f03c5a9cc4b91c878dcc0592152bcae2ad330574b97e8ca93a293

Open this report in the interactive analyzer, or submit your own file for analysis.