Malicious PDF — malware analysis report

Static analysis result for SHA-256 22542e0e86a1557b…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 12:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4d529866db2102a643bea9e1d07e524d SHA-1: 6ef583615a3baa649a84cdbf9474bfa003fdfae8 SHA-256: 22542e0e86a1557b8ce3cb7ecf6ee86e2093f15120839e60dd64f448ee3c7200
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous links and the nature of the heuristics suggest the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=christ+community+united+methodist+church+selinsgrove+pa In PDF document text
    • https://cdn.sqhk.co/jemitaku/ghrPhbm/welinijuvudi.pdfIn PDF document text
    • http://migerov.xyz/excel_sheet_background_image_no_repeatwggzh.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/jiHicjj/save_a_life_adopt_don_t_buy.pdfIn PDF document text
    • http://wunedefewadonif.22web.org/surfboard_sbg6580_wifi_setup.pdfIn PDF document text
    • http://leafester.online/zajujinezizosisixexir55.pdfIn PDF document text
    • http://znakomstva18x.site/idgam_meal_gunne_nedirhcbkh.pdfIn PDF document text
    • http://ctyr.ru/dizunenibikumefu7dps6.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/hir0DPJ/rainbow_meteorite_costa_rica.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/gepWjhF/snappers_restaurant_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/zZhhehj/17468919550.pdfIn PDF document text
    • http://e-devletodeme.net/betterttv_emotes_android17gav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juruzozesema.epizy.com/barcode_maker_apk.pdfIn PDF document text
    • http://pikawin.rf.gd/spatial_data_management.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/kevumovugavarokazomosat.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/ensure_clear_mixed_berry_nutrition_information.pdfIn PDF document text
    • http://xewapumu.epizy.com/tonodipivadabanab.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/wumagolepuselusizufaxu.pdfIn PDF document text
    • http://rosukijabadizi.epizy.com/how_to_put_editing_marks_in_word.pdfIn PDF document text
    • http://magajavopisili.epizy.com/ataxia_pediatria.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/nuzosumesexakamefopefazom.pdfIn PDF document text
    • http://rufopanapoxo.rf.gd/zajuramefiboratexojep.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_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 5552 bytes
SHA-256: 92104dd712149c190594ba776f28ad9439f045cd2ccce79bc81fa6b2eab6ab8e
font_01_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10568 bytes
SHA-256: 70f2481b8de7d0c5f001d6046374b409cc61eff0648ee034694c0cb8ba792633

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