Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7f958d7845c73e…

MALICIOUS

PDF

78.0 KB Created: 2020-12-15 15:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 42f855119a7a910b8d182811a744683a SHA-1: 09d7a293557140adf4970050eb627c7c77695ea9 SHA-256: dd7f958d7845c73e0526c46ad159d07709228f43d566e609b6508482a5cd18cb
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=whatsapp+gb+terbaru+april+2019'. This URL is associated with phishing and malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were extracted, the malicious link and the ML classifier's high confidence indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?utm_term=whatsapp+gb+terbaru+april+2019 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fca6d5ca4e08.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/wutezigojuxi/bhojpuri_song_hd_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e0e73f-e8d6-4db3-a74b-24ac7d4772e4/seven_head_dragon.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/fuvabujegara.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/common_sense_economics_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/asymptotes_of_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/dotulawuse.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/tv_repair_austin.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/adobe_reader_free_er.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc46b88fa04221c71ad6104/1606708105208/43101143970.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd16a432780c533aaad3fd/1606227621311/my_dungeon_shook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fc0dd6b9ee0f32b8772c522/1606475115706/fix_up_boy_problems_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c8bb65-edc7-48ca-a2d6-cf1dd9203fb8/one_piece_ace_death_arc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 5716 bytes
SHA-256: dc1f309e0827ab1b116a3379384d55002da92e2b6239b1adf982027829ac889b
font_01_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 1940 bytes
SHA-256: 1c6ba7332e038ebc7b198ea9eb87a44ea1652f134df48d751f3aacc0c6303f00
font_02_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 10908 bytes
SHA-256: df64503328c73f55b2ae9431e7add2a0bc1b6f43f29649ac256353f040e8dc29
font_03_sfnt_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 16580 bytes
SHA-256: d070b17fb28d728a590b674404f67e915dec0a0b9ff05b4fb05d4c7e7bde64f8

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