Malicious PDF — malware analysis report

Static analysis result for SHA-256 443706577f828e61…

MALICIOUS

PDF

75.5 KB Created: 2021-01-06 21:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9da4b7c6895d82bd0d23e93fe193e20d SHA-1: 8278b928ef69623e442f077941b81f31685d95ea SHA-256: 443706577f828e6117cfe2420b10b86208f69fa778c03bd978e6d48efea7c3e7
76 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for an MFA/one-time-code harvesting lure, indicating a phishing attempt. The embedded URL points to a suspicious domain, likely serving the phishing content. The document body, though heavily obfuscated, contains text related to backup recovery, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://trafffe.ru/aws?utm_term=recuperare+backup+whatsapp+icloud+su+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0f0870d748.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ghpwhh0/wugonexosojuvaze.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/fSdxigE/final_fantasy_tactics_wotl_android_review.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/wisuw/naa_autograph_telugu_songs_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/17309207724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f5e940-9b2d-4555-93f3-cafbe906f755/2277957304.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/ccna_data_center_200-_150_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/bass_booster_for_pc_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8247fd21-2ff8-488a-b589-abcaeabe12f2/kabijebopisomimupixeraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5beae113-0392-4822-9498-7e53fe8f9d8b/3497971636.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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 5464 bytes
SHA-256: 11362a6f41e925915f1c10651ba6a5ad7d1ddc8770715bb106a977c627b9c4fa
font_01_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 2188 bytes
SHA-256: 340b7d9bf4cef1933f06564a3b4bdedb18dfabf60f93382df505a47e23618af4
font_02_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 10296 bytes
SHA-256: 3a42772d5c8c43cdd363984a28752a6224543da772259d6403169344f16a423c