Malicious PDF — malware analysis report

Static analysis result for SHA-256 51022032525a18ff…

MALICIOUS

PDF

104.3 KB Created: 2021-03-18 15:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6f4cc8a4442e59bbc69e61b5c84c5fbf SHA-1: a98440bc9e475e1b973cd5b89b02a324762c0a19 SHA-256: 51022032525a18ffa042441dcdb6ea6a83d7e965b6b2c80c75d9f2740f4038a2
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, 'https://pelibifir.ru/wix?keyword=ge+profile+spectra+xl44+oven+manual', is likely the primary vector for the attack, potentially leading to phishing or malware download. No scripts were extracted, but the PDF structure and heuristics strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=ge+profile+spectra+xl44+oven+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fe78e139657f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_601532bbdc7fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_603605f7ebd7f.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ii2V5HP/65033402808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fc73227777eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_6030df6583faa.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/how_to_clean_airbrush.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_603bbcf51223a.pdfIn PDF document text
    • https://cdn.sqhk.co/mawodoso/iCLhjhb/pokemon_heart_gold_randomizer_download_ita_android.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/756d5765-ad73-4d6e-8b77-3f6bdc531190/94305502315.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/pathology_mcq_book.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/8716296140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb4436c-f60b-424b-820c-fd120b47116a/vusosawadukuderabofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff4dd67-ca2d-41ea-b108-2937f3e1eed6/mutev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95d7136-5ebf-4155-aa55-215c099c6a4a/why_marriages_succeed_or_fail_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c43b3a-f747-402d-9496-e6c4f6fba729/jerev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e456e6-17df-4500-942e-ee28a9c48c27/omega_horizontal_slow_masticating_juicer_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a692a773-385e-4529-b955-7d163777ba1d/harley_davidson_2015_touring__service_manual.pdf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0cce75-7054-4aa1-8747-f283b5b0a4bc/69219404443.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_off0001589a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589A 5408 bytes
SHA-256: 32d4c20c9ceae2f5966c03db044887910d57936d5168d41b5ea1a72f4d1e991a
font_01_sfnt_off00016b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B01 12012 bytes
SHA-256: 09f63bca062338721f84871f3f1522877450b0eb3e0a4854ba52dfe670ade61b

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