Malicious PDF — malware analysis report

Static analysis result for SHA-256 6062a4b9e2e8f3f7…

MALICIOUS

PDF

71.8 KB Created: 2021-01-25 01:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b03e4af86c9fc687e48ee1282e214bbf SHA-1: 94e86b5a8af27ad312fe861a3c3a0669a443a1ee SHA-256: 6062a4b9e2e8f3f704e437aa673ef90d9ccf4d00b6ddbe57ff9c9f76bf36c453
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with the primary one being to 'guxumexowe.weebly.com'. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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://seumenha.ru/aws?utm_term=beverage+air+mt12+service+manual PDF link annotation
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/pazugijimesewevufi.pdfIn PDF document text
    • http://gakivako.iblogger.org/hootsuite_2019_social_media_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fcfb07dedf6b.pdfIn PDF document text
    • https://denudosija.weebly.com/uploads/1/3/4/0/134017010/lifodagel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376874/normal_5ffb673b7be8e.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/riwaxage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_600537ca6d98a.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/bufexa/wajezorexibawotelofixe.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/82219908673.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/bride_of_the_century_episode_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/internet_explorer_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/60226738556.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/68711374882.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/53983583107.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/tovonuguneb.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/rubber_flooring_sheet_goods.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/baltasar_ile_blimunda.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/81875276541.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_off0000c666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC666 5412 bytes
SHA-256: afeba1bca75b5b0bceadbb5726d23043463375a76dc1ce5d1ac3c633197885d3
font_01_sfnt_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 10464 bytes
SHA-256: 2761141b2d4a1d2980200fbd0beb27f05ba73512ba6538679d5d64b9cb90c391
font_02_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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