Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b3a61d94e4ac45…

MALICIOUS

PDF

80.3 KB Created: 2021-02-25 01:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f603d53d05239b175e3cb170509cec00 SHA-1: 81661c942f2b2db8d4a6d6ba306aaf9338aabe6b SHA-256: b0b3a61d94e4ac4575bd1188048f267a4b9143c97b73028f1dabb95627d59873
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains multiple embedded URLs, one of which is directly referenced in the heuristic findings. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for a phishing or malware download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=watchmen+graphic+novel+plot+summary PDF link annotation
    • http://natlegend.space/download_m64plus_fz_pro_emulator_apk28eh4.pdfIn PDF document text
    • https://cdn.sqhk.co/xupumekejaxa/hhdugfE/54003116406.pdfIn PDF document text
    • http://kengoru.space/97253229411zqym2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447916/normal_5fdfa0a5d8583.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fc761cbc9a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_601875f558fa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5ffc27ed59b73.pdfIn PDF document text
    • http://xowivek.iblogger.org/worksheet_on_long_multiplication.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/5XCjghg/raxuzasodoborebexunon.pdfIn PDF document text
    • http://mamajan.space/navy_and_marine_corps_overseas_service_ribbon_instruction3ml0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5ffbdf80f12e1.pdfIn PDF document text
    • http://abzac.me/short_moral_stories_in_english_with_writer_nameo4go9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421201/normal_5ffa25053a962.pdfIn PDF document text
    • https://cdn.sqhk.co/gupukutolet/XKrg9E1/venmo_card_atm_limit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutogugej/51140228900.pdfIn PDF document text
    • http://magivekuwili.rf.gd/munadutirudujiribalara.pdfIn PDF document text
    • http://wijetifosoxi.epizy.com/black_platform_chunky_heel_sandals.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_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 5520 bytes
SHA-256: e330b9d244d7171d502567e8c65e68f3ae450d7f9f85a10ea469dd393f21e70c
font_01_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 10412 bytes
SHA-256: 15f61bc492b0a87f4981dc2277133453a83817914824b5e54dd1cea2a118fad7

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