Malicious PDF — malware analysis report

Static analysis result for SHA-256 524d926cb318878e…

MALICIOUS

PDF

212.0 KB Created: 2021-06-14 05:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2b8ed67c6f4825bfea0380f38f8ea16a SHA-1: 6d46ee0d2a57661b8dab8c28c40d1eb6a9078fa0 SHA-256: 524d926cb318878e55efa6d28a1951d26ba4dd8d74b52982a69bf7b580fa5888
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 as a phishing trojan. It contains an embedded URI pointing to 'https://chcial.ru/pbw?utm_term=picsay+pro+1.6+apk', which is likely the primary lure. 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, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://chcial.ru/pbw?utm_term=picsay+pro+1.6+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385010/normal_60302c01811f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_5fd7dadb9d4e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_604512feab9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478669/normal_604a88060a8f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5ffb35802b041.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/d85ea305-2dac-477d-b07d-c554a59efcab/how_to_answer_a_what_inspires_you_question.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c362becb-859a-413f-84a0-8616743a3fca/litafimezeluluxaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa49fb2-fe81-4234-a69e-db152dc0cc60/metekakam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932c5a7-8ee3-4dc7-a722-d91ede566106/levons_les_yeux_voici_la_vraie_lumire_partition.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/how_to_connect_denon_heos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969adbae-8eef-4417-8b9e-7c416b8349a0/48726994631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fafa59-2d1b-462f-b407-deeb5ef4b083/nordictrack_treadmill_exp_1000_x_manual.pdfIn PDF document text
    • http://tedadopite.pbworks.com/f/skyrim_shout_commands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e22f30-d4be-43ce-b3a1-2cab40caec1d/72309327328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d1f36c-22e1-432c-81bd-e22976dd548c/sogezuken.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/juwugekidobujuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ddc7bd-d9ff-4be6-b832-5f3d59111b3e/dizirigozesosajak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6edc147-9170-4669-a5f9-6f64754a5467/fender_champion_40_voice_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90d6e92-1c73-45ad-a6d2-26c2f49ffbe5/nesifufiwokotazefo.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_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 180132 bytes
SHA-256: d4964892f64bd72e21b199f41cf123f2c3831bb590e58cec67089a29dabf036e
font_01_sfnt_off00030a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A08 5300 bytes
SHA-256: f8907ae16f38683227d8234a64fd58ef5ba1ab050d6e9c988c5c71213c94b196
font_02_sfnt_off00031c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3E 10616 bytes
SHA-256: 441df019111b1c7c282eadbbbd8ff8ab7ab33c583551ff451caf235cd3c48f0c

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