Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1921e4ea7de55a4…

MALICIOUS

PDF

76.7 KB Created: 2021-04-30 06:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 71dfebd5f1d7a1e41d20f3ca2ee0b851 SHA-1: 901574812523a8c291fea7b455ca35a0d6199440 SHA-256: c1921e4ea7de55a4356d55f5d8b4659371e6d692207a2d2f201284f170dd5382
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5485

Heuristics 4

  • 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 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
  • 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://lozipotod.ru/strik?utm_term=how+do+i+turn+the+lights+on+my+razer+keyboard PDF link annotation
    • https://cdn.sqhk.co/fagevibe/WehgFjf/smash_bros_ultimate_dojo_guide.pdfIn PDF document text
    • http://zobowodinoto.iblogger.org/3097069287.pdfIn PDF document text
    • http://rutakaganutidu.22web.org/online_pic_converter_to_jpg.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/cjgYDMA/dead_cells_switch_update_1._4.pdfIn PDF document text
    • http://naziniza.22web.org/ginuwozut.pdfIn PDF document text
    • http://groshyk.site/92136679117ikvei.pdfIn PDF document text
    • http://sonuzevemuguke.iblogger.org/octopus_apk_gamepad_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/jgUltie/chess_game_online_play_with_friends.pdfIn PDF document text
    • http://creditreportus.info/zeselorzq6fr.pdfIn PDF document text
    • http://weareanonymous.org/kai_sa_runes_guided1hep.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/5znDgjd/sezuduzopatubofuzuma.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/solucionario_algebra_lineal_kolman_8_edicionajj96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://likabagumaza.rf.gd/what_is_ochem_like.pdfIn PDF document text
    • http://sotenuzalarabi.epizy.com/xolukumidavalim.pdfIn PDF document text
    • http://bagirisuteladog.rf.gd/equivalent_resistance_worksheet_parallel_circuits.pdfIn PDF document text
    • http://lafeseg.rf.gd/primary_secondary_colors_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/45267667772.pdfIn PDF document text
    • http://rorulapuvutoj.epizy.com/51833162121.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/speed_queen_washer_and_dryer_black_friday_sale.pdfIn PDF document text
    • http://masagofoxinupad.rf.gd/pikezivoropunapep.pdfIn PDF document text
    • http://juruzozesema.epizy.com/how_much_does_it_cost_to_repair_laptop_fan.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/wepid.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/telerik_reporting_login.pdfIn PDF document text
    • http://dukiduzafenej.epizy.com/fmcsa_clearinghouse_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/33041382913.pdfIn 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_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 5532 bytes
SHA-256: 954b48c531e2193e75918dae2ece9f4d29236ec6788702ed9e5c1d968747add6
font_01_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 11240 bytes
SHA-256: cfde91b4ac8f76ed4da403f033e1da3a5ac8c103d70e2c81fa86b6a258f72317

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