Malicious PDF — malware analysis report

Static analysis result for SHA-256 25370bc84221271a…

MALICIOUS

PDF

72.1 KB Created: 2021-02-22 23:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 2353f4d92abd8210f523cdd9f2a2a06f SHA-1: c920330e1dbcee2dd618b67569d5c39f2fe9d785 SHA-256: 25370bc84221271ad73837ab99fb90ed51cbcd61f4f23223a39e127183ad4014
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also present in the document body. ClamAV detection and ML classification strongly indicate maliciousness, identifying it as a phishing trojan. The embedded URL likely serves as a lure to a phishing or malware distribution site.

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://jottigo.ru/wix?keyword=watch+star+trek+into+darkness+free PDF link annotation
    • https://cdn.sqhk.co/nivabetaz/VZvFsgg/bubble_bubble_pop_crazy_shooter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5fe74e530c3df.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/figif3Z/limarubigixazofasam.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/khfPicd/dog_freak_out_sounds.pdfIn PDF document text
    • http://bizawojumufa.22web.org/almacenamiento_interno_android_5._1.pdfIn PDF document text
    • http://vutaturubodud.22web.org/mezex.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/hfhfid5/maruvopukaluruvideker.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jRV1Kt7/paper_rings_taylor_swift_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/jdXjhjb/44740386316.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/dobesogum/creative_suite_cs6_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/9946918277.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/ritiwovivog.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/vavutal.pdfIn PDF document text
    • http://lufirapubabe.epizy.com/military_surplus_tent_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/abir_chatterjee_photo.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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 5156 bytes
SHA-256: ea4b087c1d0ce70a8bb058a36821814aba8b9869c1877ced2ac26abcf486800e
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 10412 bytes
SHA-256: 4e662fd346a42f7b8e1aeefbd810f3f78840c0b6496dc97c17febe8ed5f96b9b