Malicious PDF — malware analysis report

Static analysis result for SHA-256 0812d6564abe9420…

MALICIOUS

PDF

75.1 KB Created: 2021-03-21 21:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a7e9f3eaa250578e5a5cf2eceb382f0b SHA-1: 01588ce2b4c00bda125a6e2540381f105cd033ee SHA-256: 0812d6564abe9420404f6c0d730b3780367aa931218740e32bf3d5b5899f6c6a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded links points towards an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=medidas+de+la+cancha+de+voleibol+wikipedia PDF link annotation
    • http://tesekal.mygamesonline.org/tissot_t_race_touch_manual_espaol.pdfIn PDF document text
    • http://bostpolamos.site/80162053802wer4l.pdfIn PDF document text
    • https://xizuzumuk.weebly.com/uploads/1/3/2/6/132682261/2215417.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/kaxefi.pdfIn PDF document text
    • http://100p-f.ru/dream_interpretation_dead_baby_chickaf2tc.pdfIn PDF document text
    • http://healthytrands.com/81303804970quo5r.pdfIn PDF document text
    • http://fresh-ita.space/how_to_draw_a_cat_for_kidsh90bh.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/jefevixofarixu.pdfIn PDF document text
    • http://koreanluxe.com/cargowise_exam_answersx7xjw.pdfIn PDF document text
    • http://itwow.info/26583910453wbmw8.pdfIn PDF document text
    • http://axecheat8.xyz/yuri_on_ice_12_subly2mx.pdfIn PDF document text
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/4286626.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/mofusuv_zefadimim.pdfIn PDF document text
    • https://damusabuweko.weebly.com/uploads/1/3/4/6/134609075/puvux.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/91821110867.pdfIn PDF document text
    • http://whowill.ru/16024860769sfuyg.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/wanasuvedigo/dyson_dc14_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/annexure_e1_for_hssc.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/dbz_goku_vs_super_android_17.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/2600_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/gym_cancellation_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/interview_in_english_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/87916134594.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5424 bytes
SHA-256: 8416f469da28b835a87c943197c7d845e77a88faf8f3ed70ec46eb65258d84b8
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 10700 bytes
SHA-256: 5fbe94c3920c6ba78a37c3aeaa256888af9ed25e49eed73aae53f3244f43ae99

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