Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aec0e23951e5a73…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 17:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1ca5f233ac5c68f4082860b01ce08749 SHA-1: 24366c0453f9d8c4510fefe3fe565028eb1821b7 SHA-256: 0aec0e23951e5a7318ad75d03c2784f1d21f9fed3ffeb88c34fdec763173f2f6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'Gi tract physiology pdf'. The presence of an external URI and the high risk score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/award?keyword=gi+tract+physiology+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375341/normal_5ff4d389cb535.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/596fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_6039453f27842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_603951ff7aee2.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/98235a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_60133a9e99c5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fceaf3210d9e.pdfIn PDF document text
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/6980053.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/casio_chronograph_user_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5ff1083f36da5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5fcbf6d890386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5fee0e1b3bac8.pdfIn PDF document text
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/jeboputosu_nubakisi_diguva_gewoz.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/nubofonam-runuzagabu-komovuzewovopad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_600073be0d656.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/puwepoxitob.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/wonofuxaraw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamekukibudinos.epizy.com/32391851501.pdfIn PDF document text
    • http://simarawi.epizy.com/how_to_describe_tree_at_night_mask_body_shop.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/96_jeep_cherokee_fuel_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/volufipifowazo.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/catalina_iphone_update_progress.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_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 5548 bytes
SHA-256: b508c24dc55bed72996b31704326bf91622508b145fefcbdff15c239e90eebb8
font_01_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 10000 bytes
SHA-256: 09899b3530d3e16c945063161109fdef12f2b045ff6c35c3153f503ec8f49b99

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