Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedb0c749caa8d4a…

MALICIOUS

PDF

92.2 KB Created: 2021-03-15 23:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4029c2b2efeb1f67cecfc736e96bb2 SHA-1: 7a328020c906f5254e12ed1ef98978634cd0f05c SHA-256: cedb0c749caa8d4a474ee8a5afa45d5bb5570f137be9164d7198164c68f4edce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing or malware distribution scheme. It contains a large number of external links, many of which are designed to appear as search engine optimized content, likely to trick users into downloading further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=bsc+1st+year+chemistry+practical+notes+pdf
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/7e6db.pdf
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/vimujopogojiwaz.pdf
    • https://labomozojaxige.weebly.com/uploads/1/3/0/7/130738499/zivekoxilar_buxitojasu_dulafuvi_regovatutewudel.pdf
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/4220699.pdf
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/61060d7bef7d4c4.pdf
    • http://kevufeduwatawos.mypressonline.com/10085879174.pdf
    • https://relitemora.weebly.com/uploads/1/3/4/3/134352419/dirare.pdf
    • https://relorurexo.weebly.com/uploads/1/3/5/3/135391300/lemuwesad-fawiwivizunun.pdf
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/1019101.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_7fa1401206314e8c987f269adb0e7c0c.pdf?index=true
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_18a8a9c7881045af8e61e42c6a8fc1c2.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_5b5ddd007715441fbd2db0319f9a86f3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6ccd1c6-befb-4c03-b304-a59020ff963e/how_do_i_export_garageband_to_mp3_on_ipad.pdf
    • http://kuxoxokazutuv.myartsonline.com/558531912.pdf
    • https://s3.amazonaws.com/kozewuposoridil/crystal_reports_10_for_dummies.pdf
    • https://s3.amazonaws.com/votawawo/35165994777.pdf
    • https://uploads.strikinglycdn.com/files/48b1fc43-ea7d-46d9-958e-4b30c13fa03f/explain_what_is_meant_by_bubble_diagram.pdf
    • https://s3.amazonaws.com/tozaduliwubega/the_art_of_r_programming_github.pdf
    • http://namakanexir.atwebpages.com/83190846400.pdf
    • https://uploads.strikinglycdn.com/files/f28d13b6-b702-41a4-a675-150be5ec6125/14453347416.pdf
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_4acf8b9e051d4b4c8d143974dd8cc054.pdf?index=true
    • https://uploads.strikinglycdn.com/files/efbdfb39-2e2d-414b-9dbb-e76d883763ac/sennheiser_hdr_180_wireless_bluetooth_headphones.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001057e.bin
e538ea232257e548d2b1695bb19ea5eab382aa9a24b724623d20afe1198b4289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 5388 bytes
font_01_sfnt_off000117ac.bin
6e71d169410b92797b519fa182089d6591ad978062b6fc6ec31a68b57add6f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117AC 11304 bytes
font_02_sfnt_off00013e43.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E43 4324 bytes
font_03_sfnt_off00014c44.bin
97f1a9afc1e546fdb8e10a756ab05c329c160473c1aa664cb493eaba272549b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C44 6464 bytes

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