Malicious PDF — malware analysis report

Static analysis result for SHA-256 97251c78545fa720…

MALICIOUS

PDF

79.7 KB Created: 2021-03-06 13:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36f80e7c785e6d48b6fc75c260036c15 SHA-1: 00bb18cc74b3c388b71f7b702297bca6d8e79a83 SHA-256: 97251c78545fa720ff5bcc09e7d3021a266d678de13f522ac968e66be0f790bf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the primary goal is to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://resalured.ru/award?keyword=dometic+fantastic+vent+7350+test PDF link annotation
    • https://cdn.sqhk.co/puwipaneke/kjdrhjv/kadejuxefurime.pdfIn PDF document text
    • http://vkysnaya-eda.site/titus_andronicus_a_more_perfect_union_lyricsqvw4l.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/idHgghe/vivaxajolujagigip.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/ibm8he3/20990517248.pdfIn PDF document text
    • http://belldiscount.ru/dwi_nhtsa_manualumhy8.pdfIn PDF document text
    • http://businessoutsourcing.org/el_antiedipo_capitalismo_y_esquizofrenia4enbx.pdfIn PDF document text
    • http://freedate18.xyz/xiwanekedebeexe72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_97cd04d4c07544729df2791430962633.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vigevot/breaking_the_law_guitar.pdfIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_e8ac2d60765b4d0bbc587e93d4cb5b5e.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_6e7e23a3ac9d44158845249d981a4027.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_873df0e8906a48bc9a318a637b1c3b06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/pinawijevezojibotimofas.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/removing_stuck_caliper_guide_pin.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/wexaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/34104588836.pdfIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_9a509974d2c64902b917c387cbc2ee69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goviwigax/56383666654.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/fusionner_2_en_1_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/literature_circle_worksheets_high_school.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_4d741116cef54895985dfe6f114bd591.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_9a51e4d7072c4b37aea14cd26747dbfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/buxujukowajutaseroloj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 5468 bytes
SHA-256: 771420fbaebf54d774d76afa9223bc26c76b93589b8a9bd0d6eb494ac6a0d203
font_01_sfnt_off00010af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 11092 bytes
SHA-256: cb06bb722e92c2d491eb56c55a24375eb9b945a9c76dedbef652651a8b6f4d01

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