Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea092882118ebbc…

MALICIOUS

PDF

71.3 KB Created: 2021-03-10 19:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6c5d64025d3df8c4bda135cb8531b26c SHA-1: 467ef0d13b4740c6887e21111db23d3f85fdeba9 SHA-256: 9ea092882118ebbc4f861ee9b3f4105b49945582fabd504d7b86347ddd670b87
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation scheme. The document body, though heavily corrupted, contains keywords related to 'camera scanner to pdf apk pure', likely a lure to attract unsuspecting users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=camera+scanner+to+pdf+apk+pure PDF link annotation
    • http://productwood.ru/hp_technical_support_interview_questions_and_answersuskwn.pdfIn PDF document text
    • http://detonic-italia.website/high_art_vs_low_art9gg21.pdfIn PDF document text
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/xizesekolazon-gukereradixoka.pdfIn PDF document text
    • https://xexijawabipej.weebly.com/uploads/1/3/4/3/134317257/38db34274fa3.pdfIn PDF document text
    • http://damvglaz0.xyz/rirubasqmx5.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/wanazukusowix.pdfIn PDF document text
    • http://peteferix.mypressonline.com/64122308618.pdfIn PDF document text
    • http://peskomment.ru/kozemuvezijn5gto.pdfIn PDF document text
    • http://prizinsta365.website/17838993303f0b62.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/151934173806il4u.pdfIn PDF document text
    • http://argo-tourism.com/past_tense_and_past_participle_list7yscd.pdfIn PDF document text
    • http://it50disconto.pro/87829668714zlyqh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_d136135d38da4052a910c7534226ffbe.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_151811f6aaed4f9685e60c910f86152c.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_55ab830c712f410fbeb94784ef7fb613.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_408589aa4d8447fb91da1aadc57dc47f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/52480356155.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/vusufopokipuzebobatavule.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/76939203662.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_30e724285b4042beb68abfc04f7bd244.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/26898702026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 5240 bytes
SHA-256: 01c33ae3020f303535a5731bca90bef1b96feab9f582a01d7eb1829f73f2e6b5
font_01_sfnt_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 9828 bytes
SHA-256: 1b40b45c9c325de99663ce31fd9e9a2795c715b066eab0cba559a94c0a1fa955
font_02_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf