Malicious PDF — malware analysis report

Static analysis result for SHA-256 528c99af7fd2eee3…

MALICIOUS

PDF

82.5 KB Created: 2021-03-06 11:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7653a329b0a38e91f35dc300550c65b4 SHA-1: a198617329031d2ef32f1c1c7dafcccfc866cbbf SHA-256: 528c99af7fd2eee355e88ed0fac8237d4b9f063c7fe2151777b988aced7e4b0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect to a phishing page. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

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://xezojetit.ru/wb?keyword=hp%20pavilion%20dv6%20hard%20drive%20removal PDF link annotation
    • http://claire-irk.ru/which_of_the_following_statements_concerning_internal_control_is_truej8pei.pdfIn PDF document text
    • http://winsbig.space/wapupujijedefezajefiraxaknfs2w.pdfIn PDF document text
    • http://rating-bookmaker.ru/bogizegoipty.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/xasenikatotom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fd1a966439b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420756/normal_5fc6233cb667c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_60087ad8505ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376879/normal_5ffb038a4c9f4.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/brother_hl_2280dw_manual.pdfIn PDF document text
    • http://foodguideblog.com/action_words_worksheet_englishomcjf.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://s3.amazonaws.com/gadumagabusodel/bepogufegalenefasav.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/kindergarten_letter_tracing.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/kutabexawagevizowozowoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b679069-33a9-47eb-b3b9-404395132661/dafatobalukujowenulaze.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/android_emulator_proxy_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20402ff6-2d40-4ac7-87c0-3248f9a4d244/mackie_onyx_mixer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/66637969574.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/irrigation_agronomy_sr_reddy.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/lufibesebajomodowujujif.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/85899077012.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/27677152938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d55c8d-14fa-4ffd-93e0-9c6f269c2715/kivetu.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 4904 bytes
SHA-256: 09445d3d5687ffa096b3cb731fc10710fa1425c7a070e382533e938ad489e304
font_01_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 10820 bytes
SHA-256: 9f79f623235dc8d579f2c7dd5d4b61e83ca2e8af35b727bcf4c66f022cfac275
font_02_sfnt_off00012e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5B 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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