Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14fb1a4c8e35cb8…

MALICIOUS

PDF

76.8 KB Created: 2021-05-31 01:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 601afabcba51775051459728773d2ef0 SHA-1: f4766072dca67d0ff8c24cb42e8001359ffc9440 SHA-256: a14fb1a4c8e35cb8b1cadc3c5e3314180a249e9a63d93f95b5e66feb71d12a31
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to driver downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=synaptics+touchpad+driver+windows+7+32+bit+gateway PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452839/normal_601b61dac5f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_603b5515eae85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5ff01a56daeac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428335/normal_603f813dcdb85.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408596/normal_60b40b298f78f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc63fe92df39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_6040134790b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_602e21b5d7e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_6050da8038e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_603bb6bed86b5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4376609/normal_60affe5695ab5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461495/normal_5fccba7602fb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fd76e24a050e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_600fa28576e5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5fe56fd8498b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_6026dedfeb5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_603c394de4760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_604f0ae0965ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6020b3575f098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5fe2dee231cdd.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/9ddf374a-280b-420e-b32d-4035720b7c92/taketoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13f94a5-58e1-4267-adc9-83c527113ac1/what_is_future_generali_life_insurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e6fbce-3ead-453b-8dbd-18480d9700ec/can_you_use_turtle_beach_ps4_headset_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d365a730-2398-4e18-ae9a-e49f1df2d2d5/48354073589.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_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 6176 bytes
SHA-256: 3505be0bf1bedffa608e2f2e6db6e825c5fba179b4b31b4690205963a4dcb58f
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 10764 bytes
SHA-256: 3a6817c761dd47f1743c105fe018870a56de9846ae00307c583ec8b2ef6870d9

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