Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff56b2c337d15032…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 23:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6cf1ed68e87bcced0108c64f5284b722 SHA-1: d9b828e8136697491a1ff7ece34385a2e42d4038 SHA-256: ff56b2c337d15032d0449a3079bc41d9f1de8b1735d672bc3bae76376666db72
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'site acceptance testing template'. The presence of numerous links on disposable hosting and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=site+acceptance+testing+template In PDF document text
    • http://pozopamux.iblogger.org/suzowotofevelozifatok.pdfIn PDF document text
    • http://verifybadgesbusiness.com/pugapa003os.pdfIn PDF document text
    • http://vashastrahovka24.ru/anticoagulantes_orales_mecanismo_de_acciond0kdt.pdfIn PDF document text
    • http://interior.estate/andr_rieu_performs_anthony_hopkins_s_waltzsf3jy.pdfIn PDF document text
    • http://tofuvuniz.iblogger.org/xifonadezabukoropejik.pdfIn PDF document text
    • http://instapriz.website/88032698823uxisj.pdfIn PDF document text
    • http://adyga.site/nudoferovojoxujozejopsy81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sosubixoza.rf.gd/sifesepavilu.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/fonefoxod.pdfIn PDF document text
    • http://konapawejiwevin.epizy.com/tejugiv.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_cb64f09b8c264d6bab61f443e239548a.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_2a45e630f02e4daca93485137fc02711.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_4fb2cb79db8e42d3ab2587af67256657.pdf?index=trueIn PDF document text
    • http://lamekukibudinos.epizy.com/jofazotilagalezot.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_da243e1563354c98bea0d91253ef6d3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/wukotarelifafapenog.pdfIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_0c3f1e617a6a477eb2764b878f1ca65b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubefula/nazim_hikmet_siir_ask.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_82be6cf405b34a3c804635873586fe1a.pdf?index=trueIn PDF document text
    • http://puwegobatove.epizy.com/maithili_program_sheet_basant_ka_nach.pdfIn PDF document text
    • http://jojugabijogi.rf.gd/acer_aspire_e14_laptop_battery_price_in_bangladesh.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_8a64359c9e5542f995443e1bd865b68b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/litunux/the_secret_movie_2006_rotten_tomatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/how_do_i_find_out_what_my_love_language_is.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/substitution_method_worksheet_math_aids.pdfIn PDF document text
    • http://kagejadel.epizy.com/83735025480.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_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 5260 bytes
SHA-256: a0ab8b0516ffe7862ea3ada6755b573dd56271ae7ec8d28e9f5d43bd291571b3
font_01_sfnt_off000105d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 11756 bytes
SHA-256: 86adf1d3ab3fdb7a2d3d47ce86af7f6154a47184d63c21eb96c7a491262eaaa8

Open this report in the interactive analyzer, or submit your own file for analysis.