Malicious PDF — malware analysis report

Static analysis result for SHA-256 8721d946f734298b…

MALICIOUS

PDF

79.0 KB Created: 2021-02-13 03:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01155e23a1ab2ca21a6748556980fe0b SHA-1: 1eea38b40d56c5e3385a7e4207aa9980e19677e0 SHA-256: 8721d946f734298bae7b47270e82dfadab31cbf73a9c1681f8956de7f5dabbdd
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The file also exhibits characteristics of a PDF link farm, suggesting an attempt to distribute malicious content or phishing lures. While no scripts were extracted, the presence of malicious links and the PDF structure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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=parts+of+a+speaker+diagram In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fff97faacfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_6015c981e8b40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fe02c833c36c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366011/normal_5fc939292dac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_600f0259254df.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/ramosupanomaseza5e2o9.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/zovifesedonoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_6006edd9bca7f.pdfIn PDF document text
    • http://medtechnika1.ru/warhammer_40k_8th_edition_ork_codex_vke00sm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_601736e3eea53.pdfIn PDF document text
    • http://qlemelest.online/kewifomogawitotezixuxuqjnmu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393626/normal_6000db9d02656.pdfIn PDF document text
    • http://vkysnaya-eda.site/pesumamilewurefukijazajyyzx.pdfIn PDF document text
    • http://antonioit.space/dbx_venue_360txeam.pdfIn PDF document text
    • http://orbitan.fun/episode_choose_your_story_best_mistake7d9t7.pdfIn PDF document text
    • http://remontlegko.info/breeam_uk_new_construction_2018_technical_manualn6sbx.pdfIn PDF document text
    • https://vajudufebebugi.weebly.com/uploads/1/3/4/6/134696622/zefes-mitipevoni-jaralilon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff4aae66ffd6.pdfIn PDF document text
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/dukapedekubuwij-raxupazilokedud.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/julabi.pdfIn PDF document text
    • http://vovality.club/859026104936fuot.pdfIn PDF document text
    • https://wimazuwog.weebly.com/uploads/1/3/0/7/130740080/jimekefexufigo.pdfIn PDF document text
    • https://luwakanit.weebly.com/uploads/1/3/0/9/130969899/a55b9e8590f.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://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_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 5076 bytes
SHA-256: 9a0aeb7ed764308f0c23b9dc0e73a9d752725f9dc058cbf4e6d0ddcd39348d21
font_01_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 10504 bytes
SHA-256: 786ac8d593acfcdf5b5d2c8fd802f8a3331ab6a7ff634211ee3f28d4ba66bd4f
font_02_sfnt_off000120b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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