Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e624c99eaa90ea0…

MALICIOUS

PDF

76.9 KB Created: 2020-11-10 21:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 410f2fa615383a8da7613414203109d5 SHA-1: ebf3098d181cf2f713f6fa65e09875b9fba4f1bf SHA-256: 9e624c99eaa90ea09bc33bda592f1dde2f817f2706498a03dc477f8edae1a1f2
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains references to 'Pokemon go friend codes' and the authoring application 'wkhtmltopdf', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafftec.ru/aws?keyword=pokemon+go+friend+codes PDF link annotation
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/zapirugufalufit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jedasaber/nazamulevefonakutibuboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49bc51d-ab4f-49a1-b02a-0856d055f267/9073750753.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/nausicaans_star_trek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70e195a-2784-4475-8bbc-f01609f1afd3/pestle_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a37ff0-fb04-4590-9179-35be194f75bc/fufuvidugekazibiwesatek.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/importance_of_case_study_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb089b9-3752-48f4-8767-907aa3b8df2e/crime_scene_basics_worksheet_2_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/zuwuduvesokuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/zulurepemiri.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/30405692993.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/fisajokesimubufomake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1c3807-4714-4c73-a1ec-f47727fa32b5/32450467888.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_off0000c31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31A 4872 bytes
SHA-256: d0712d969a7d24e7b3b6d6e1d6013a705357067f1ef4f85cdb348b0b14eeb0b5
font_01_sfnt_off0000d37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37F 1736 bytes
SHA-256: ab9f71bee23f3ba7d8cbf1a3524e9e6c4bfddc7ef01ffc511df8bc4d77cb153f
font_02_sfnt_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 11120 bytes
SHA-256: bb3542bc3e9f9b11b40e6e7e7946e3e0132b56f0f765d8b18e18b211164193b5
font_03_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 16852 bytes
SHA-256: af325b201e6951cba409d9e25173ad358ce559301a33038f4748dc8422c3b935
font_04_sfnt_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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