Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b9b9e00d95f8b8…

MALICIOUS

PDF

99.8 KB Created: 2021-01-11 23:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0ba8d8e7191afadcda3b66cf6f7a08bc SHA-1: 211e6341da6774275a0a5e3c7d6d5bec5aa4069c SHA-256: e2b9b9e00d95f8b835751b65a77a4f3c9860ac58c3318ca159e8b0c2175b27fd
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/aws?utm_term=auditoria+contable+pdf+libro PDF link annotation
    • https://noxigizafovezad.weebly.com/uploads/1/3/1/4/131438329/3f45b.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/moteginabesimanukik.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/sukuta_poduzazoxozewan_juxogegama.pdfIn PDF document text
    • https://sadutixonigonu.weebly.com/uploads/1/3/1/4/131412491/xulofoganaxeras.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/rezovovob.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/zedapebiximipopopuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/RaibgeV/break_it_down_again_lyrics_traducida.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jjjj9ij/27598818912.pdfIn PDF document text
    • https://bookauthority.orgIn 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/zuxadol/wesobipixuzifono.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/car_coloring_sheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/autodesk_sketchbook_pro_mod_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/bansal_classes_dpp_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/55291351708.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/groundsure_planning_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/gevokupaxu.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_off00013e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7B 4980 bytes
SHA-256: c1009a805113949f2671be9d12d52992aeb55006af23f6ca63e91d215f046efe
font_01_sfnt_off00014f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6A 10688 bytes
SHA-256: 3b789791e5d431343b1d984e579835cd3f7b42fe3bdf9c2f35a0c4ac8c78d710
font_02_sfnt_off000173d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173D0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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