Malicious PDF — malware analysis report

Static analysis result for SHA-256 c165cf8eec741036…

MALICIOUS

PDF

74.0 KB Created: 2020-12-24 07:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 25da4b1da80e0a58833c8b7ba91c4857 SHA-1: 93814eb2a5a771c4849d99def69c65dd72c1284f SHA-256: c165cf8eec741036ec2e0c424212ca29882f95ed64f7d7a605d566718d923fd6
104 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 malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffe.ru' suggests the document is designed to download a secondary payload. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the attack pattern of luring users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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://trafffe.ru/aws?utm_term=bollywood+songs+free++3d+audio PDF link annotation
    • https://cdn.sqhk.co/dumoniriwo/5haYjoP/tigujopusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fa56ca3932e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8ed1bc12145.pdfIn PDF document text
    • https://cdn.sqhk.co/katafojedul/hiPhj4R/codemasters_f1_wheel.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/jIjbhhR/89847539978.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/ib0d9KO/valusogivo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/Hjbgehd/wonderchef_vegetable_chopper_reviews.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/27d8c811-c898-4825-819d-bbf5b5369263/what_is_the_psat_test_for_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b87c514-f0f6-4b85-8922-7cc597fb53aa/pathfinder_hunter_archetypes_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46295210-df3c-4ac0-9ad2-4b356e96afeb/padubetosasimun.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/gilibawugirodujusofadobo.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/android_studio_canary_release_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/putomitopesabefiwikiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/surat_an_naba_latin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ec3117-f0fb-40d3-a63a-bc63d8eea044/xepipire.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/chromecast_not_working_on_android.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 5484 bytes
SHA-256: d363c54bd55af85ae07525e69ea84f5b80be35d1d8675e9090357588e52b6395
font_01_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 10728 bytes
SHA-256: 80ddea41ba2ae1b25af1f637782c61a5946fe80afdb4db732e965ae68bc6dd84

Open this report in the interactive analyzer, or submit your own file for analysis.