Malicious PDF — malware analysis report

Static analysis result for SHA-256 8faa22c1063dd665…

MALICIOUS

PDF

79.1 KB Created: 2021-03-25 11:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac3b1a8d66d9bdffb79a91cdff43fcc4 SHA-1: 373dbf8999a8f770284611a444f01d1f80b52245 SHA-256: 8faa22c1063dd6651c49304a7441e3942c2398120faa9a1646ceed6e93b55df2
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains and are likely part of a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=income+statement+ratios+template
    • https://cdn.sqhk.co/metexemoraga/ffejfgh/gifofusalol.pdf
    • https://cdn.sqhk.co/duputokodoz/hjjjHBe/chicabana_as_melhores.pdf
    • http://rabizepafuxonag.mypressonline.com/98817865663.pdf
    • https://cdn.sqhk.co/vikafaselida/aRget2r/67787102771.pdf
    • https://cdn.sqhk.co/kojagopomon/gfggpkf/android_studio_gitignore_plugin.pdf
    • http://rawoxaxevog.mygamesonline.org/which_is_better_jbl_xtreme_or_xtreme_2.pdf
    • http://kadanijojabuf.mywebcommunity.org/asterix_and_obelix_comics_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kawerulim.onlinewebshop.net/stephen_kings_it_movie_full_cast.pdf
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_c0a80f277c884173b8e103b5e2b5024c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c4f40e83-b4ad-4a6b-b175-ade0a2068f1e/how_to_get_rid_of_a_pimple_on_your_nose_piercing.pdf
    • https://uploads.strikinglycdn.com/files/2fb037b9-53a5-45bf-afaa-d17485cf27cd/68411082975.pdf
    • https://uploads.strikinglycdn.com/files/8bcad4f9-df0a-4229-8dbe-b5ed31a89a2e/73631383018.pdf
    • http://saluwagasa.onlinewebshop.net/46954605852.pdf
    • https://uploads.strikinglycdn.com/files/40188e79-3cdc-4e25-95c8-fb0fef48b9de/73196523275.pdf
    • https://uploads.strikinglycdn.com/files/90db9894-04ec-4075-886b-39462e40b31d/significance_of_commonwealth_v_hunt.pdf
    • https://uploads.strikinglycdn.com/files/81caa539-ba53-4add-9298-b7c995361d77/how_much_money_does_an_architectural_engineer_make_an_hour.pdf
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_7da1cb6806ab44d28fdda8ffdf61fd3a.pdf?index=true
    • http://pizenusogusu.atwebpages.com/myself_essay_for_job_interview.pdf
    • https://uploads.strikinglycdn.com/files/45d7afd7-00f3-4594-a3ad-cef2a0f58fec/20991251651.pdf
    • https://uploads.strikinglycdn.com/files/e6faefee-ab8c-49ba-b677-12a83e0faa6f/metal_gear_solid_3_hd_trophy_guide.pdf
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_1ee2db7f0c8c4df6914ffd65e7c0dbb4.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf3.bin
abc1282b2c4ef5f48e58a1406a15aacc2904ea4abf9d67af7674c8f7990b6598		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF3 4804 bytes
font_01_sfnt_off0000fc0a.bin
8d1d4d0946f52aa96326b1732cb371a6e813114087d07e51e2b957caf9b8dcab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 10924 bytes
font_02_sfnt_off00012124.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12124 4324 bytes

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