Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb411346a30f538…

MALICIOUS

PDF

67.5 KB Created: 2021-01-30 00:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1389559d05124d5353d9c48b508a34c1 SHA-1: 8a23e41da7db78fbace4a6fe765c7ae00a96b1c3 SHA-256: abb411346a30f538f3c325ebc65d5b4eeb4ac9718b8aefc4c52c33b2da4fea2d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=bell+county+warrant+roundup+list+2016 In PDF document text
    • http://thiswaytovogue.com/82780829397q4uoy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5ff2c1950fe30.pdfIn PDF document text
    • http://discovljzg.fun/fopaxotidefifiwitiwowur3z3l.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/c39d23949afa413.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/puvopawamofakon-lumawagobe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424666/normal_6003c04226290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fee137248279.pdfIn PDF document text
    • http://clipshd.design/nintendo_switch_online_app_apk_latest_version71je2.pdfIn PDF document text
    • http://koprovk.xyz/mibofaxasemex0f870.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/3059375.pdfIn PDF document text
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/38250b20a76216.pdfIn PDF document text
    • https://fadoxidibeja.weebly.com/uploads/1/3/2/6/132695582/befadadoralekisutus.pdfIn PDF document text
    • https://fipuwetula.weebly.com/uploads/1/3/3/9/133997959/fanet_dudasidutexeza_muxomijafurupo_kimovunepemanat.pdfIn PDF document text
    • https://jofevuwob.weebly.com/uploads/1/3/4/2/134235005/d2d7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/79119414332.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/foolproof_financial_literacy_post_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/another_word_for_automated_answering_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/android_tv_box_terbaik_2018.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_off0000cb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2F 5788 bytes
SHA-256: f7440d7da87b1032e85581311d72c42facdb053afb5926e461527ab9c0c50c54
font_01_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 9912 bytes
SHA-256: aa28ddbadf7f6c52d2f1292d8a463de47afbc9ecbb53397be7e0a47a1270c7a8

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