Malicious PDF — malware analysis report

Static analysis result for SHA-256 7016b6a6521ade45…

MALICIOUS

PDF

109.2 KB Created: 2021-01-11 09:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1fe7df9b2e80ea21cb44110c3dd7e193 SHA-1: ec9fa59ffe64ec94384797207358dece88ac1b58 SHA-256: 7016b6a6521ade4525cace4329987a32cbc0963b9cedebbcc794530d777d83fb
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=bacaan+sholat+5+waktu+pdf In PDF document text
    • https://cdn.sqhk.co/supesuvepo/CjjjgKb/fishing_clash_tips_deutsch.pdfIn PDF document text
    • https://lonitavow.weebly.com/uploads/1/3/4/3/134355974/vokibotodakor_mirezejalojid_luzufuko.pdfIn PDF document text
    • https://cdn.sqhk.co/salusasopuvi/Mmwkjj9/54601418847.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5fc94b4f0ddbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/libosokune/notification_center_ios_android.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/handbook_of_plant_virology.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/rejabebifagiradidu.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/gasket_sheet_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/fuzoposumizadifigibozabaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/98439226749.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/37411058655.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/1709527996.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001739f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1739F 28576 bytes
SHA-256: bf86da3184027675189ed0ba9b6cab11ff8cab319abd188e6be455bf8021345f
font_00_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 6504 bytes
SHA-256: aa373976f5288e435b6a8f160422e1a6b4468b6a985843c754781678cf4b6720
font_01_sfnt_off000125c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C3 5476 bytes
SHA-256: dc9044ff720c11558f56547a004e9774afe1cf311a9d2452eb7a293652b88a51
font_02_sfnt_off00013878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13878 6536 bytes
SHA-256: c00ed0f5c505a097b94acf25ced38a4accc942794373bdc18345c247a32fbca4
font_03_sfnt_off000149cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CD 12156 bytes
SHA-256: f597b0b8fadf85caf9c8c18c7afc150b8ad71da348cf465c201e45ac3c4407be

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