Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c43d548c295fe7f…

MALICIOUS

PDF

85.0 KB Created: 2021-06-02 13:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1b0ec6df3f151358cfdcb7ccbc5f91d1 SHA-1: b0b3f16a729c3611a31eca96513e0ed44683c0aa SHA-256: 9c43d548c295fe7f9c15fda955433a85c45556c05144c29477a9058ecd424bce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://dugedepap.ru/123?utm_term=maintenance+breakdown+report+sample PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464739/normal_605d507521b61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446638/normal_5ffb3bbeba1a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373504/normal_5ffaa3197f611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366313/normal_5ff65a463dd40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_6055b76c95669.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4404753/normal_60b74d6634082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_601df472b1e06.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
    • https://uploads.strikinglycdn.com/files/7e280769-867c-41f8-82b5-9e43d567f0b7/does_netflix_have_catch_me_if_you_can.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6cecee-699a-4c89-82d3-13fc7e370553/55319073211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ce1b59-4bbe-458d-aaea-2dc1c08089ef/narowizotimupukusigevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e931f51d-18d6-4e2a-b4ce-350b621bb502/cartoon_wars_3_gold_glitch.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/af_sosyal_bilimlerde_aratrma_yntemleri_ders_notlar.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/tere_bina_jeena_saza_ho_gaya_sanu_dj_song_mp3.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/f/65184482830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e897e1df-f412-42e0-bc98-07698def1821/in_christ_alone_hymn_lyrics_and_chords.pdfIn PDF document text
    • http://jeselivid.pbworks.com/f/mulogesofa.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/how_does_scout_describe_mrs_dubose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c3355c-621c-40c6-9a40-0724b5ea6d23/67162559357.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/wisupura.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144483510/what_is_the_function_fractionating_column.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4837576b-0f35-4a89-a21f-7dcf39c53e48/we_wish_you_a_merry_christmas_sheet_music_piano_easy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 5308 bytes
SHA-256: 93384128c18aaab9e7695f1c387413d572edffabcdb133a820cb4099dd2cb0f7
font_01_sfnt_off00011553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11553 10456 bytes
SHA-256: 2bf23f3132102ad395901155602265c3df422cbd68ee691612460087a562e488
font_02_sfnt_off00013872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13872 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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