Malicious PDF — malware analysis report

Static analysis result for SHA-256 7684da012675722a…

MALICIOUS

PDF

71.4 KB Created: 2021-01-08 05:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f01bc5fb7277de3f0205705d4c995617 SHA-1: ecfadf95a38aff66438984a04be5e62e17c180d9 SHA-256: 7684da012675722af734b784629c6cb90b033b128e05927c959a0d0d5bbc8d07
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although the document body is heavily obfuscated, the presence of an external URI and the overall detection profile strongly suggest a phishing or malware delivery vector.

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://trafficel.ru/123?utm_term=the+very+hungry+caterpillar+sequencing+worksheet PDF link annotation
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/5ad0c119fc5d6.pdfIn PDF document text
    • https://zogugixuwomu.weebly.com/uploads/1/3/4/2/134234599/nuxunovuje.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/3498508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f91ee968d40f.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/ff4c0894-3e6f-4cba-b48d-81f41ff61751/facebook_app_download_for_laptop_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314fb57d-5875-486b-b27d-21ba03374eae/train_unloading_factorio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/019d219b-84bd-44b8-865c-b37148c7b546/31151474101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed9dcc1-c8c3-4376-92d1-36a944beb30d/convert_1_parsec_to_light_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f05141-ea62-49e0-b3d6-b39f6260794a/gazawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f843dc-3807-41a2-bda8-0fe087cd80cc/check_safeway_gift_card_balance.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/40955163775.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/10_android_tablet_deals.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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5588 bytes
SHA-256: f6072f82fb571feb834d055b32760a355576a3bf6240332ba955ee191a244827
font_01_sfnt_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10836 bytes
SHA-256: 183a8cf87d95ebb7eb853141a6ab666e9137595603213227a6ffd22137e0ebcb