Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22626474249e3cf…

MALICIOUS

PDF

85.0 KB Created: 2021-03-29 02:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bcfe5f502fd76adca89e1d327c9b5e36 SHA-1: 064a965d10487e323c216439ef297998f6a5f05c SHA-256: e22626474249e3cfef930fe7cdea63acd6b259a63536f1e5d9b7ec88297fc476
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=shoulder+muscle+anatomy+posterior PDF link annotation
    • http://mishabelle.ru/usb_player_circuit_diagramhatxr.pdfIn PDF document text
    • http://sawawobutexukut.iblogger.org/giwimo.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/51MIuP4/zenonia_5_wizard_build_guide.pdfIn PDF document text
    • http://dfds.in/fufukarevudajiwogizupirom2xv0.pdfIn PDF document text
    • https://cdn.sqhk.co/kasunelebak/JifgcB1/famous_texas_gangsters.pdfIn PDF document text
    • http://trokot-newshop.online/listening_skills_worksheets_for_grade_2klr27.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/gzgg8jd/barbershop_cast_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/J1jaFif/new_pinball_pro_vs_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/7hdgije/bugsy_movie_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/jfidggL/81922592979.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/nKjdgc5/goat_simulator_payday_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/CijR1jg/cut_in_mouth_get_infected.pdfIn PDF document text
    • http://revershjtb.site/13854717474y4w2r.pdfIn PDF document text
    • http://obuv-kozha.ru/what_questions_are_on_a_psychological_evaluation1menp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sizatopus.rf.gd/microsoft_powerpoint_venn_diagram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/sas_do_over_numeric.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/longman_dictionary_of_contemporary_english_online.pdfIn PDF document text
    • https://9370005b-87d8-49d8-b27c-18dce193a2f1.filesusr.com/ugd/52ea04_ac62ff50651b4d64970ea8d0787847cc.pdf?index=trueIn PDF document text
    • http://rikonuge.rf.gd/tefexudekitewoxeroxa.pdfIn PDF document text
    • http://vogijub.rf.gd/strategy_map.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/loganolurikazi.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/adobe_flash_player_9_free_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/filmyzilla_bollywood_movies_2018.pdfIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_e33bdfc5f52b4be3b9c60d4578e27a74.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_35ecca5e69d54be49af7e39bffa52f14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/15263929299.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_off00010f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4B 5520 bytes
SHA-256: 34898f7114bbe9ab3348f45648ee6df4f2cc743d62a92607a3f5bedd90f4bb16
font_01_sfnt_off000121e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 10728 bytes
SHA-256: a3f823d415c66c742abee5c68da277c5245f69a4a2efa490eb15ce648e0c45b4