Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae00979ddb7992c5…

MALICIOUS

PDF

90.0 KB Created: 2021-03-10 06:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2fdd37ba8b31d9be500e00216df5a3d7 SHA-1: 8ecc1e909ff2426944b0a9e3ad1ab3977181529f SHA-256: ae00979ddb7992c5821f775b70bfc1985080a1ac32b5962f7877099213e6cf53
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 a suspicious domain, which is likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a "Mental status exam cheat sheet". No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=mental+status+exam+cheat+sheet PDF link annotation
    • http://kewatupu.scienceontheweb.net/katukositizaradisape.pdfIn PDF document text
    • http://astropsychology.website/99040853485yj49a.pdfIn PDF document text
    • http://big-ita.space/1826829828izxpc.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/fibiramedusasek.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/djc3gjd/dolagiduparu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_6030fdff7f0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_601cfd4ca737b.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/wAigYnO/download_underground_crew_2_drag_racing_mod_apk.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/how_to_use_chord_inversions_reddit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_6030aa9e64e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404514/normal_5fe12c8077b94.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/fhaZgfB/vakazapizudutij.pdfIn PDF document text
    • http://fishing-rods2.club/multiplication_tables_printable_worksheets_freek2t6y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/acute_limb_ischemia_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/fijar.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/jasetemuzumigokebufa.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/zedegisakofelim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a05edeb-1307-4d28-89f9-2ef5214931e8/how_much_is_a_smart_tv_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a36845-bdf6-4131-a4bc-fb25576fee89/the_secrets_we_keep_trailer_legendado.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/nomefugusajev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4931c9dc-2d32-42b6-b65e-74292fc76911/what_is_the_social_contract_theory_hobbes.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/ap_biology_test_questions_evolution.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 5016 bytes
SHA-256: 8fd08ad60ffebfb7e9406f5f7696fbc9e4e0b95220a1a38453874255dd61c829
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off00011971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11971 12296 bytes
SHA-256: 9d8730dc3739ebf90fcca7623c6c12254937ff1324b00fe441493c910032877c
font_03_sfnt_off0001435f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435F 16352 bytes
SHA-256: b369ab9add6b7b3fd52e5043072c31f90306f2a1851c7068208b4eb9279e0370

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