Malicious PDF — malware analysis report

Static analysis result for SHA-256 6695f01cceb63bf7…

MALICIOUS

PDF

88.8 KB Created: 2021-04-04 23:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45639549f78b8d3276c7f92b999e34b2 SHA-1: 7f8f1579a6885c89492751d7e2481a6f626dfca3 SHA-256: 6695f01cceb63bf7b3efac2570d1e2a64560dca7daf315cbdc8f9b7be7471b9d
136 Risk Score

Malware Insights

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

The PDF contains a heuristically identified random URL that points to a PDF file, indicating a likely attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/strik?utm_term=python+dictionary+get+nested
    • http://calipshatngaccs1.xyz/5227801855mrytf.pdf
    • https://cdn.sqhk.co/lizubenesowi/d2x1icF/armaan_malik_kannada_songs_mp3_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5ff9371f7978a.pdf
    • https://cdn.sqhk.co/tirekidifole/iLiaGid/hashtags_to_go_viral_on_tiktok_2020.pdf
    • http://sdfafq.info/pc_google_chrome_windows_7f4mit.pdf
    • http://13millions.store/30950958281u3m80.pdf
    • https://cdn.sqhk.co/nivunufozub/jajdmlE/ost_about_time_part_4.pdf
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5fd84b5f3f48b.pdf
    • https://cdn-cms.f-static.net/uploads/4500883/normal_5fe6b251cf441.pdf
    • https://cdn.sqhk.co/guwezasov/jibtZge/jebagixeniruzugevu.pdf
    • http://gratoramm.website/tizuvonidemebikodiwafoxukbaiuo.pdf
    • http://tgesheff.xyz/xudafomejej9vves.pdf
    • http://theraisins.pro/524419479027i4ue.pdf
    • http://sereluxulu.iblogger.org/puvuv.pdf
    • http://alphabitx.com/gudaxusixareekl9.pdf
    • https://cdn.sqhk.co/tibakekavero/rhiEgg5/92718180083.pdf
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd2d1463ff62.pdf
    • http://stixlife.info/238877639812xv33.pdf
    • http://timecodes.net/lamobebegarugegutjxtjw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xubewabe.epizy.com/ramajaluzulonuxujosatez.pdf
    • http://najepesirezamuz.rf.gd/thank_you_letter_for_answering_my_questions.pdf
    • http://duzujowe.epizy.com/70112152240.pdf
    • http://wemiwapava.epizy.com/77047843173.pdf
    • http://kuvepagigifu.rf.gd/75889873879.pdf
    • http://surenus.epizy.com/15690690171.pdf
    • http://todiweluwazem.epizy.com/75483778615.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aeb.bin
92ea251d19cc6673f697f0e8204ef0e8fc5f888cd02683a3f885bc11566df526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEB 5272 bytes
font_01_sfnt_off00012cdc.bin
8b0abc98e38d8110dc24b9013b03b2f4e61858dbfdccf0cd163f6638a20c90f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDC 11904 bytes

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