Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfe1ba554262754…

MALICIOUS

PDF

78.3 KB Created: 2021-05-11 23:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9bda583982998079ee1a2bf7fefdd392 SHA-1: 580b62c1a5d30061e5f6a9d3083a3e92c62af48d SHA-256: 8dfe1ba554262754ea1d862d49c69447d7e71d54acc2bc92b6be5f3ba1a4765b
216 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. It uses brand-impersonation credential phishing. 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://komiwego.weebly.com/uploads/1/3/2/6/132695384/6edd66e8898.pdf.
  • 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://dafemum.ru/strik?utm_term=software+development+methodologies+agile+and+waterfall PDF link annotation
    • https://cdn.sqhk.co/kezagajasiw/Aiediga/the_bucket_list_family_manilla_instagram.pdfIn PDF document text
    • https://komiwego.weebly.com/uploads/1/3/2/6/132695384/6edd66e8898.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/6b90f99e253821.pdfIn PDF document text
    • http://xepusuxewo.iblogger.org/anthelmintic_activity_of_plant_extracts.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/hjnkkjS/space_invaders_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/Gghjchd/redungeon_apk_mod_hack.pdfIn PDF document text
    • http://gadosamu.iblogger.org/alan_moore_biografia.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/lorifawuvawot/emulator_android_ringan_untuk_free_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/pulibuni.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_a039fccdedb749b5b4eb025955ade5da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/79006601017.pdfIn PDF document text
    • http://rixoxogan.rf.gd/misal_romano_latin_espaol_1962.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/wodufutalurizivak.pdfIn PDF document text
    • http://nabeluropezoli.rf.gd/tosuwesozubol.pdfIn PDF document text
    • http://modedavap.epizy.com/gonobamolemivoj.pdfIn PDF document text
    • http://mejizemobimoli.epizy.com/wrong_turn_2018_new_movie.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/57795913872.pdfIn PDF document text
    • http://xutirekivob.rf.gd/wawilenimitiwumapirojinix.pdfIn PDF document text
    • http://wovotunuvovon.epizy.com/celebrate_me_home_kenny_loggins_sheet_music.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_dcd4d3e8071d46bead054ebc7b477498.pdf?index=trueIn PDF document text
    • https://bedcdfbe-b17c-4359-8dfe-ddcf70bf4d6f.filesusr.com/ugd/7ae8b3_68447d9e29ab4721ac5740939b3ec5fc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 5712 bytes
SHA-256: 2cf813b2ae834f8ffa021d618baa03a52ff7b25fe3ebc051042ee0f4eb82fe88
font_01_sfnt_off0001066c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066C 10964 bytes
SHA-256: 73738f80f37a22e657b1490659c73e77d4d323ca74138f700a267d1ea6bd8ed7

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