Malicious PDF — malware analysis report

Static analysis result for SHA-256 921d228d7d5c1e5e…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 04:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4e3da7d33a77c270368748ea2e93b53b SHA-1: 4ddc445bbf811a6c41a7f1c9a1f4c770d835eb8d SHA-256: 921d228d7d5c1e5e620b413299b127adb4d4cc581716c1c2712d98d84e90446e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content, likely through a JavaScript exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=bobby+owsinski+mixing+engineer%2527s+handbook+4th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/sadudolamom/Ozrg1if/bisozisobawagixa.pdfIn PDF document text
    • https://cdn.sqhk.co/nozesinipi/ghgiKhi/ftd_flowers_sympathy_plant.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/63827275152.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/12335710139.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/numimedujoxovad.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/3hchbFl/fegifotivuxinisetiwipozo.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/how_to_put_ink_in_hp_deskjet_2545.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/gdoieja/65141581905.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/peburivowokoxob.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/ctltP0t/8846359417.pdfIn PDF document text
    • https://cdn.sqhk.co/mowogibewu/OphiEnV/grand_theft_auto_vice_city_soundtrack_zip.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/jaicRhj/70734590627.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/litunux/63186759806.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/refilujozekutel.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/gekarusafivaruwuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/22315780649.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_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 6060 bytes
SHA-256: 36c7c7ba28e55f27ee7d00e66cde2130e45c08e48aa3921fc07f03a765279a31
font_01_sfnt_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 10632 bytes
SHA-256: fb0130e5bc8a706d4b48c9fe7bb8d04e83ef44a0abbf31d3f57b2ff09d80cb4e

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