Malicious PDF — malware analysis report

Static analysis result for SHA-256 496fa2e99383944d…

MALICIOUS

PDF

82.4 KB Created: 2021-03-27 19:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919eebdc94b6a084446967855d83b53a SHA-1: 51986d7960c466a2bb90a631416a846519f544a4 SHA-256: 496fa2e99383944db97a7067b62707563f404cc9b5c2cbb9335fe722d95c5d67
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Babbel spanish full apk' download, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/123?utm_term=babbel+spanish+full+apk
    • https://cdn.sqhk.co/sisagoku/gzjgijb/nabofepute.pdf
    • https://cdn-cms.f-static.net/uploads/4500201/normal_604a8afed7295.pdf
    • https://cdn-cms.f-static.net/uploads/4370777/normal_604a4dad10143.pdf
    • https://cdn-cms.f-static.net/uploads/4453720/normal_6019fa2b40f55.pdf
    • http://zagozogenef.sportsontheweb.net/vokonafo.pdf
    • https://cdn.sqhk.co/fironabe/hgggifb/pesexijekozeremunafalabuz.pdf
    • http://jalosus.mygamesonline.org/asset_management_company_business_plan.pdf
    • http://katipef.medianewsonline.com/74782381960.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexavofezoxi/focusrite_2i2_vs_2i4_2nd_gen.pdf
    • https://uploads.strikinglycdn.com/files/0f296669-8d42-4599-a5e3-f3b92c030493/wumax.pdf
    • https://uploads.strikinglycdn.com/files/8d00a554-78b5-4831-a711-93aa7e65495c/91892260739.pdf
    • https://uploads.strikinglycdn.com/files/83c5bbb9-28ba-4651-8b21-293e3727641d/tuvinodutexexukobateg.pdf
    • https://uploads.strikinglycdn.com/files/1f394b05-b065-4ddf-b209-74f2f8023337/nourishing_traditions_bone_broth_book.pdf
    • https://uploads.strikinglycdn.com/files/6d30cad3-d6cb-4a4c-8712-a789d2a1bf4c/38744110680.pdf
    • https://uploads.strikinglycdn.com/files/d8929042-43ea-4e48-a416-f43703d27339/what_god_says_about_drinking_wine.pdf
    • https://uploads.strikinglycdn.com/files/6732a6bb-85b3-4899-b28a-00d11486bfb5/what_kind_of_transmission_fluid_does_a_2006_jeep_grand_cherokee_take.pdf
    • http://firiwigisu.atwebpages.com/books_of_the_bible_chart.pdf
    • https://s3.amazonaws.com/zidenigad/28132403622.pdf
    • https://s3.amazonaws.com/bezegoluzose/80177592523.pdf
    • https://uploads.strikinglycdn.com/files/23df3587-8d1b-47aa-8e33-032d962d4018/60193673416.pdf
    • https://uploads.strikinglycdn.com/files/620d612d-f765-4b26-ada2-b0bf8513656c/how_to_open_a_bunker_hill_digital_floor_safe.pdf
    • https://s3.amazonaws.com/pekatikisuruki/zonojuximamadutusuzowa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ab.bin
acb5fb5b45f070cd598d94dad166c004d30213a41ed8403efa795eebc461494b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 5148 bytes
font_01_sfnt_off0000f82a.bin
60d72c33a402a25e0afd74fb9fddab7ff1cb63ad28a3d4d61c771f9c4a037c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 21604 bytes
font_02_sfnt_off00012746.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12746 16092 bytes

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