Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7a7e52396e3c5c…

MALICIOUS

PDF

91.0 KB Created: 2021-03-17 21:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13f30a4bd3f574d18a82f7a5a788bf5f SHA-1: 5efc51b5529a50c02008943992ac7b9956bb5a74 SHA-256: be7a7e52396e3c5c266c62b3491a64489f2890bce4734894a18a4d2ebbe65855
156 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 0.9964

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 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.
  • 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://golowaki.ru/fweb?keyword=athlean+x+max%252F+size+pdf PDF link annotation
    • https://cdn.sqhk.co/xonarewu/ibhiigk/one_calendar_month_notice_tenancy.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/jejcugd/gilazuwesopiturowixivona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_602dd401d3c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_602929ef1566b.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/Hjcr5hi/11stone_9lbs_in_kg.pdfIn PDF document text
    • http://copyrighthelpcentral.com/abrasive_jet_machining_project_reporun32k.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/icjhwjd/bee_packages_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/vojeruzujuzi/hid0ido/19079637443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5fdbdb240dab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_600d462c21063.pdfIn PDF document text
    • http://agent-ritual495.online/95680197009u5tro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_60299a34c8961.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/informazioni_partenze_aeroporto_catania.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/24145406650.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_66792811988048c8be77da9eae6837e1.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_76bcf3afa1f94253b96b928bded8657f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/glencoe_algebra_2_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/46109652583.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/nefefibefojutavi.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_4f2f8373260748518616544a2a47b5b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/lusofajuxisetilewedadig.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_649c2707e7484b8185db778a74168360.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/line_6_spider_iii_15w_guitar_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/lizajanofidup.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/blackmans_bay_primary_school_uniform.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_71945e3f5ed944c2aaf2a918690ea3d1.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B2 5328 bytes
SHA-256: 1a1a9a9ab0c9a57b234fe3d236f59b9ba7ae1f3b6ace3471c26c9dfe62ccbb91
font_01_sfnt_off000135c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C7 11428 bytes
SHA-256: 5f6920c2977582f74ef32b72711c02584290465acba19d7ab71f27f8666a68c5

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