Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7b182aa82c5367…

MALICIOUS

PDF

70.3 KB Created: 2020-12-15 17:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 49d9c815797b337914d72ea55cf8e850 SHA-1: 11d7f4d109266360b353d8490f25cb89283c49b6 SHA-256: 4b7b182aa82c5367b3f2ca3c3cf58b818e2cd00412efbfcf86a9e0112bc53f6c
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/aws?utm_term=biloela+state+high+school+formal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457843/normal_5fcb22491f778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0c8125-0238-440c-acc1-5195a36edfab/gejetizokejir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd86d1bf-0b4c-4d9e-bfce-8d01992ffbc8/fazasorebujabajepu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc28ed89ee0f32b87a63fac/1606586072877/snapchat_plus_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dc9205-3cc3-4f4e-a944-adb8a09dc958/business_mathematics_worksheets_for_highschool_students.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc11804eaf37e3b64c299f7/1606490117647/what_is_tpcastt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8d9d28-1d0d-4f13-ac64-d60bd79cd32a/55464615619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9e3556-3c3a-4248-b516-17e083c7b063/wojusimebidewura.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066c960f2895dc1e54813/t/5fc1cef3f81c9a2a0ce49b75/1606536953626/junie_b_jones_book_character_costumes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc710dc161f8068becc65be/t/5fd02c1e12264b5dfdc33b84/1607478307506/xufikomasinerokidaju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc571d8a5bc066edfc42d69/t/5fd6fb65ffab5d3c561038a6/1607924583367/96203742360.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_off0000d747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD747 5344 bytes
SHA-256: 0d31e515654a8df4de411e33d78851b8bbe50af53b84848cdee4b560cbbc5e44
font_01_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 10348 bytes
SHA-256: 5daf24ff0b60338aea07bf301d24585081c81cac7565786b496676c973d76798