Malicious PDF — malware analysis report

Static analysis result for SHA-256 826286e3d6bbe8d5…

MALICIOUS

PDF

78.6 KB Created: 2020-12-19 11:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8ffaf957ec02f75379adf6a55c6d050f SHA-1: c65bdfa3eab9fb4ba1b89f0cb476250860bc3aa1 SHA-256: 826286e3d6bbe8d54781702e6d0f5702033f46a07540cab1ac445e5c330ea1ee
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'trafficel.ru', which is likely used for phishing or to download a secondary payload. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafficel.ru/123?utm_term=barnsdall+public+schools+facebook PDF link annotation
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/6524728.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/1e6b903f62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fab7da8c9e53.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://static1.squarespace.com/static/5fc6751d27a199023adb75cf/t/5fc6af389b1ed03538cb0fc3/1606856505186/26393201926.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cecdff13940aa24c0152/t/5fcc322f33187724c4e397d5/1607217712628/bepajigepesotiva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce00cd69d6d20b2bf97c4a/t/5fcf9d6c5c8977691e436d15/1607441774135/bulunidaman.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ae4a13a450bab0f051b/t/5fc6ba1bc953717e09bfec1a/1606859292162/brick_game_retro_classic_bricks.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3de4f98375720a5c14b/1606284255432/naruto_jutsu_list_names.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11ff5ea4a794d5646682f/t/5fc4e08d5147b14804cbaa01/1606738061618/vilusubijavavowijasej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6cb88b-6c83-4774-8cee-9a86ee496d59/kusibipomofurubik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527b012d-49e9-48aa-a22f-7ae5260b6752/mastering_vsphere_6.5_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bee3d41-813a-4754-80b9-fea32e6a1b1e/mobedifufosoredulupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2cdc759-bee6-48b4-8348-07f0be65e8f6/82811456262.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 5296 bytes
SHA-256: c5c9c635bb1367e019b8ae20a31387a740cc90c73ae2f55ac0d0e7d29ec8bae7
font_01_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 10444 bytes
SHA-256: 7e85490f153020a278c102483b6a5bbbeeaf092c6c8777c4ae6a68fe5cd75e9b
font_02_sfnt_off00011f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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