Malicious PDF — malware analysis report

Static analysis result for SHA-256 02770fcf8d1448e3…

MALICIOUS

PDF

81.3 KB Created: 2020-11-10 20:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 478ac72e1617cf29021b457522fad328 SHA-1: 1c177e2534da571a3f8ce5fa733ea193ad4e42ea SHA-256: 02770fcf8d1448e341d34bd724eb18f99cfcd20a5ce2f479000a4905b701a924
154 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to known malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded content, though heavily obfuscated, suggests an attempt to trick users into downloading a game or related data, which is a common phishing lure. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?keyword=asphalt+8+game+apk+data+download In PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/8264358.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/8750066.pdfIn PDF document text
    • https://fejisamuzek.weebly.com/uploads/1/3/4/6/134636520/5649251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f88c9fa0f2ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5fa2f35869d6f.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/b256b272-e954-4fd8-9c48-28a6880f3bfb/cardboard_armor_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/gone_girl_full_movie_online_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd23b463-02a1-467a-b9ca-a8f548fc1b9e/skyrim_high_definition_lods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0359ee-9d78-4599-b5b4-39d1c5717f1d/vebevigejivutolul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63aa187e-68df-4b2e-81b0-3eda91f90139/75838314378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aeacd78-aaa6-48f0-a25a-3c1adc194b5e/89689661313.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001115e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1115E 23048 bytes
SHA-256: 0612b2a611c17d60910dc70ecbe7cdc32ac4728ac34ac47af1b76d8a28d8df53
font_00_sfnt_off0000d3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D5 5616 bytes
SHA-256: c87fe0ed5e2627a9f277cee17ba2b00e76b6cbfe8ae28bf05518da9147eebcc9
font_01_sfnt_off0000e6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 14976 bytes
SHA-256: 19befd4d165e68aba633ddc6938aa68194efa9ed21f97b6ed270340847d383f0

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