Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc688909e0c3b679…

MALICIOUS

PDF

83.9 KB Created: 2021-01-25 23:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f99e140ef40bd74b75e4af4323968f32 SHA-1: 6c8384834c52bae025c36b101839484de8b9de8c SHA-256: cc688909e0c3b679f5569ded9e8b8ef32daccacf1610ab347aa30fa3399273c3
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a game, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://jacksth.ru/wb?keyword=tiles%20hop%20edm%20rush%20alan%20walker PDF link annotation
    • https://cdn.sqhk.co/letaziseb/bxeiaxC/36587553742.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/aKicpge/8797557608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5feebc050a553.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446273/normal_5fc9429079598.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/hjCihcq/soxujirozogatebalud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462354/normal_5ffeecdfa88eb.pdfIn PDF document text
    • http://navaram.online/daboxegalotajohtk4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fc9182d3408a.pdfIn PDF document text
    • http://epaytds.xyz/34086158987jseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_600bd345a8b0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fd06631515aa.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/8Hhjgfo/15409525329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377908/normal_5ff32e465a675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30dc5c964e.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/2giFXIK/mijefokixafevagofos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5fdbc0906a189.pdfIn PDF document text
    • http://kanshoper.site/machine_learning_python_tutorial_for_beginnersra74t.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/xijalovelokolep/complementary_and_supplementary_angles_worksheet_1.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/24320148650.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/animation_wallpaper_for_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/wolf_among_us_mac.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 5304 bytes
SHA-256: 005b3db2b48e5923805399b7c2ae56b2267c12ac39000c104a68f0a8d83798bb
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 4928 bytes
SHA-256: a85d9dcf99f646c25cf3492bfeaf6140b71986e71f22cdbc0c9f456bf03af7f4
font_02_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10748 bytes
SHA-256: 6088df40db6e355915a67c2ec0e476d57cdc703392b066406a4765992d186dae
font_03_sfnt_off000121ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 16868 bytes
SHA-256: 34c6827e26371370c12bff2e61a1240b8e3ac3e1ba707e13d0e98011a4103890
font_04_sfnt_off00013955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13955 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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