Malicious PDF — malware analysis report

Static analysis result for SHA-256 1292bc3661507131…

MALICIOUS

PDF

77.0 KB Created: 2021-02-16 00:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cf7fb5ed49069798956354192bc22e68 SHA-1: e7980f8eee4bf439402a1e2752c628d1d41a23ab SHA-256: 1292bc36615071313acf621b5db2f877326f4de20823130f39e26129bfd6d39a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, forming a link farm, with the primary URL being 'https://druttle.ru/wix?keyword=behind+the+curtain+of+night'. This suggests the document's purpose is to direct users to malicious websites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=behind+the+curtain+of+night PDF link annotation
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/xibiso.pdfIn PDF document text
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/4764552.pdfIn PDF document text
    • https://xanosetad.weebly.com/uploads/1/3/1/1/131163691/sedez_dadube_sinut.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/195bb64.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/2587203.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/zazaz.pdfIn PDF document text
    • https://sijawakupud.weebly.com/uploads/1/3/0/7/130740213/3f6a9e48.pdfIn PDF document text
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/nedarifuwofigiwovovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/limepusotanal/98422612612.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/future_fight_ctp_guide_2019.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/kobixu.pdfIn PDF document text
    • http://bujarudulew.epizy.com/cdma_sdma_tdma_fdma_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/simple_present_tense_affirmative_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/phpspreadsheet_read_example.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/98878027449.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 5004 bytes
SHA-256: 94c3ced2e0df38488bc36692e18bb9e61b5fe1a6c40cc2355c6f1d565333684a
font_01_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 10652 bytes
SHA-256: e40939392b02391c64acda365c0ff96a04585e946aa2661b69767700eba9bc79
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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