Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbc8e93988ba0fc…

MALICIOUS

PDF

87.0 KB Created: 2021-03-20 00:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b0087cac52248171f7ade14a2924422 SHA-1: 225831ea95e9f7c0e108ef964b66cb89a77ba71a SHA-256: 1fbc8e93988ba0fcd153ebf321459d2013248316950a06b5e488d45c8ec9ce35
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/wix?keyword=que+paso+con+chip+chan+2019', are designed to lead users to potentially harmful sites. The ML classifier also strongly indicated maliciousness, supporting the overall assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://dafemum.ru/wix?keyword=que+paso+con+chip+chan+2019 In PDF document text
    • https://cdn.sqhk.co/mulepava/hbhj6gg/primitive_skate_promo_code.pdfIn PDF document text
    • http://gakurijaje.iblogger.org/ca_final_gst_amendments_for_may_2020.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/classroom_rules_worksheet.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/14289846174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482623/normal_60436e5c5a0cd.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/how_to_make_rhythm_game.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/97501292343.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/nice_guidelines_hyperlipidaemia_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/3Oijiac/ctet_paper_1_february_2016_answer_key.pdfIn PDF document text
    • http://nimuxixoxa.22web.org/chadsvasc_hasbled.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/zatupuvokevax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_6051097ac3bd4.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/YFjaspH/remuzafijirufoxugejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/susifaxixuzumetonedofawep.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/iPDd6ic/guide_tactique_pes_2019.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/nusabasonezuwe.pdfIn PDF document text
    • http://medupaj.iblogger.org/harvard_reference_guide_book.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://xemubekimivimed.epizy.com/xujosodujezaka.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_dae62ac787ac4a708d62b29ee781decd.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_c076edf887c14827a72bdb7df1341df9.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_056691b83a234f94be3e8ba54b76859d.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_83ee7e2ea2484dc2a464c94ce609f814.pdf?index=trueIn PDF document text
    • http://renulekefa.epizy.com/31482201092.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_25a09d5ad4b749e28767a616eac8c050.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 5236 bytes
SHA-256: a0c3d51fe9a478043544b01f2ebe6e93a7832b8b63d06f46620a42b68eb7f1a2
font_01_sfnt_off0001022b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 11960 bytes
SHA-256: ee7b91e0476c39237838e3fc6222435ba216e4735b653329e2ae0e2cc36d87d0
font_02_sfnt_off00012941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12941 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00013e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2