Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc73dc21101cd11d…

MALICIOUS

PDF

94.0 KB Created: 2021-03-09 13:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c1f510d2ba16c4b6644589b2f05caaf0 SHA-1: 2067605a111c8d329e41327c4af6f5aefb46374b SHA-256: cc73dc21101cd11d1000968d65c6a80f9b2e3f36e5614dda1894efe4600112d7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to host a phishing page or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=contaminacion+atmosferica+en+la+ciudad+de+mexico+pdf PDF link annotation
    • https://cdn.sqhk.co/winelolibug/fIhidhh/30915272502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_600af1bfd5143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_603eb14c97dfe.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/cUNQNhe/sonic_the_hedgehog_movie_wallpaper_4k.pdfIn PDF document text
    • http://cocobuka3.xyz/vijixenebojunevmz3.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/iXDjggi/surviv._io_twitch_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/bie3phc/20384627572.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/giehgjh/mobile_kitchen_island_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/jakadamalate/zoigRhf/movie_theater_hollywood_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/4igRxjX/words_in_a_pic_2108.pdfIn PDF document text
    • http://carinsusa.com/917237799505dkrd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_603601a1354af.pdfIn 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/mogipegi/tabisag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3a4f4a-d3e2-43b7-b34f-6ea487b5fbd6/63697419.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/10615885402.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/69832936083.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/how_to_perform_accommodation_eye_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bfcdcc-e30f-4701-86ee-0562da95ecc9/god_who_strengthens_me_verse.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_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 5272 bytes
SHA-256: e2d25cf4aab23b024ce68e69ccec7a64d6ccddad244bb3c012fbcdd165a02197
font_01_sfnt_off000133e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E5 11932 bytes
SHA-256: 4b29e8b92d5f012d91f97b88d93bd4eeb923bdd2ad2447fb45f6b9903a9469f3
font_02_sfnt_off00015a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A83 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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