Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77ce64ea95ec9a6…

MALICIOUS

PDF

88.7 KB Created: 2020-12-27 08:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6e41be3b0dff577b4f3d9888511b9557 SHA-1: ee488927e0be48634e51e8c23d04e6014610ba02 SHA-256: d77ce64ea95ec9a619a530dce2bf074bc92a215c0783fb7199cb1bf257b08724
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafffi.ru/aws?utm_term=vaastav+aarti+song++songspk', which is likely used to host a phishing page or distribute further malware. ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further supports its malicious nature. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the ClamAV signature strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/aws?utm_term=vaastav+aarti+song++songspk PDF link annotation
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/lexufaradan.pdfIn PDF document text
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/4114112.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/101c06.pdfIn PDF document text
    • https://lezovijun.weebly.com/uploads/1/3/4/8/134865909/e5bc2ad8dbf.pdfIn PDF document text
    • https://zupitexugavasol.weebly.com/uploads/1/3/0/9/130969618/ad8ecf755bb6214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/fasting_for_surgery_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/8513651222.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/semi_formal_attire_for_wedding_sponsor.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/bahubali_2_movie_video_song_hdvidz.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/i_drive_safely_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/howling_2_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/c._a_full_form_in_history.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nuwelurinemu.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/tobupunafutivaterujevoge.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011c7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C7D 26184 bytes
SHA-256: 9051c9322597de050c792f3e93a67b31b0568abc61e7d5b77115b1506d4a71f7
font_00_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 5044 bytes
SHA-256: f1a92d78d78f5105d8f96d934003a1245042ce23f89fa62d45f1b4d95fad19a9
font_01_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 12120 bytes
SHA-256: 18b93d50aad34aaa9b0d5b59b4fc574bf4182f34d7f96dfb8879303644db1ec0
font_03_sfnt_off00014a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A09 2764 bytes
SHA-256: aed35a257ca17bbd0f6c82fe15d01bfb04f2b1c0d84255630faa95450c92b9c8

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