Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14805e8a34a4de9…

MALICIOUS

PDF

108.7 KB Created: 2021-04-06 15:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f35355448c180d1c87bf67015e6527e5 SHA-1: 522ce62f466f9b7283438626c34d9396d14438f6 SHA-256: c14805e8a34a4de9ce563dd7aec32fd6173e2ef455020ec601ed3be4f93a5b53
186 Risk Score

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 0.9997

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
  • 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.
  • 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://jottigo.ru/award?keyword=unknown+facts+in+telugu+pdf PDF link annotation
    • https://cdn.sqhk.co/xifinelire/iBibpgU/witcher_2_crafting_materials.pdfIn PDF document text
    • http://trenketo.buzz/82521568417h810g.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/gji19pw/28365868562.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/jdVvBgg/besame_mucho_vocal_sheet_music_free.pdfIn PDF document text
    • http://itverys.space/abraham_hicks_ask_and_it_is_given9y3g2.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/gjggdDF/tabujejutonawadav.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hfAB8hh/92223932651.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/hciiRZV/xirefesasirefufan.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/bcURRih/technic_launcher_tekkit_server.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_1656475fa42d4dd188f6556534ef973a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/84690256606.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/knockout_js_tutorial.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/adjectives_and_adverbs_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/pevivuwakurebijowo.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/35141206770.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_8fbe39874ae74bb1a353c432bbb03587.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_b6fdd0a141cc49039bd0c1604b6b4a3f.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_a042ec081779424c8bca3bb4f9bec8f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/chota_bheem_song_mp4.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_5cbfe2de42964aeba662bae6c6cf16bb.pdf?index=trueIn 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_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 5376 bytes
SHA-256: 8fc2aa8f8107f7219255830a87714cf0a9e09e4ca704c44ce3fd2b38ff7d096b
font_01_sfnt_off000110c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C0 61156 bytes
SHA-256: de5046f689cb70adb47f9c2e165be8257863b2768dd7ad1b74242d3de5859b02
font_02_sfnt_off00017f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F25 11088 bytes
SHA-256: a60bbdb9cb6a73723b5c1bdbe6a43416ef87a80c3af02dd504b55e1f5bfc6c06

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