Malicious PDF — malware analysis report

Static analysis result for SHA-256 5415baff87baae64…

MALICIOUS

PDF

87.8 KB Created: 2021-02-18 05:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c211070a3e479e9cde8a64a3e2e27ee5 SHA-1: 5bc4b4d008014cbe5a84889cb76fb36927bb8ca8 SHA-256: 5415baff87baae64da5101ed055f0f2c1af8f904ff9d820be68bc385ae09ec68
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://baarspo.ru/strik?utm_term=goblin+slayer+light+novel+download+reddit', suggests a phishing or malware distribution attempt disguised as content related to 'Goblin Slayer'. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=goblin+slayer+light+novel+download+reddit PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/V3qcjaj/ruxenewiladuw.pdfIn PDF document text
    • https://bivajeliju.weebly.com/uploads/1/3/5/9/135978375/lirowebube.pdfIn PDF document text
    • http://yourcy.com/simone_de_beauvoir_espaoly3beg.pdfIn PDF document text
    • http://fruittea.space/foxozixibij0w41w.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/ajdibhg/age_of_empires_3_hack_jar.pdfIn PDF document text
    • https://famopenagunabot.weebly.com/uploads/1/3/4/6/134688774/wugijidatuv.pdfIn PDF document text
    • http://todayit.pro/make_lemonade_by_virginia_euwer_wolffgnylu.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/magawibur.pdfIn PDF document text
    • http://wordsideget.top/gekobivatyzfho.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebiwubeso.rf.gd/nomijavodonefevisijefom.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/mcgraw_hill_algebra_1_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/chicken_breast_nutritional_information.pdfIn PDF document text
    • http://sevidimifab.epizy.com/burn_it_up_wanna_one_mv.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/timitadizoluvusulomepused.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/horizontal_projectile_motion_problems_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/effy_full_form_in_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/67115941115.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/bofigonumuxabu.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 9080 bytes
SHA-256: 1023cbe29134989a2e2e871e94aafd0123f5b5cb1757a200afca0dcd55604a23
font_01_sfnt_off0001033e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033E 5512 bytes
SHA-256: 28496d7bc43ff18788b6d83e8a3c02850eee76f636c11fd6672e904b7104ff15
font_02_sfnt_off0001160a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 11024 bytes
SHA-256: 0a5e19e70c4e06a0da9946cf9808c818298be51ba97c77ca351f0577e0af6c5e
font_03_sfnt_off00013bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 16256 bytes
SHA-256: 0e80db746976db9917f36efcdb899007b438a587d4920ba77801f0b49dcfebaa

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