Malicious PDF — malware analysis report

Static analysis result for SHA-256 7272c0069a8fbde5…

MALICIOUS

PDF

78.9 KB Created: 2021-02-20 07:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4b964d36befd59710fcefda81a7532c0 SHA-1: 9b2c5360e874ca4fefa2f43e39d90f257c1d43ad SHA-256: 7272c0069a8fbde52565f34539948d0d4fcd4b04e0aaf0f50645395b4b6820f1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. Several of these links point to potentially malicious domains, suggesting a phishing or SEO manipulation campaign. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely to redirect users to harmful content or phishing sites.

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://baarspo.ru/123?utm_term=casio+wr20bar+battery PDF link annotation
    • http://bigakeka.iblogger.org/helldivers_weapons_guide.pdfIn PDF document text
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/60b7c8d95.pdfIn PDF document text
    • http://marketeuro.pro/vepemabu4lhj3.pdfIn PDF document text
    • http://suzenax.22web.org/water_absorbent_sheets.pdfIn PDF document text
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/627f9a053ff85.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/dqGjdqL/cruise_lines_stock_symbols.pdfIn PDF document text
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/popolixekexubowoli.pdfIn PDF document text
    • http://laxavigikax.22web.org/avengers_endgame_post_credit_scene_hammer_sound.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/vaxebisapesi/por_una_cabeza_piano_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/quizlet_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/civilization_type_game_for_android.pdfIn PDF document text
    • http://vujofif.epizy.com/60282448835.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/wibeterobamavidomev.pdfIn PDF document text
    • http://xegunapajom.epizy.com/wusovaxunifufubib.pdfIn PDF document text
    • http://kinugokapa.rf.gd/gosarakoxedolobibifer.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/wutirusenazovam.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 5160 bytes
SHA-256: a85028c486ec3328f07d50a00cfcc5314196aae95d515dcab6aea34d1ff3dc7f
font_01_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 11296 bytes
SHA-256: 4369bc3f2e8cada9d5e6f0e0660870d7554c43b0be5d6dc1136a5d2a48d7a661
font_02_sfnt_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 16188 bytes
SHA-256: bd74192abfed2e3322069fd811d193b6426b4c4c0d27f90f30016f3c0794e838

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