Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22bf8f869ae4235…

MALICIOUS

PDF

82.1 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: 8252734be0b70a2221ea96552c156a1a SHA-1: ad4b96b68012d166995c0cead26f4bb3a87da377 SHA-256: a22bf8f869ae4235e74c1b46827c09f48d73b29449b66cd31c9e5fdb65d59e3c
166 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The 'SE_CLICKFIX' heuristic suggests social engineering tactics, instructing the user to run commands, likely to download and execute a secondary payload from the embedded URL. The presence of external URIs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://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://www.daltonmaag.com/In 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://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_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
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2