Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b5e0149ff74887…

MALICIOUS

PDF

82.0 KB Created: 2021-04-13 14:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e8f9f7d3a94153bad47e4e04e3f72a22 SHA-1: 240fb4e1b89ac113687a2c6c12e348db6f920f6a SHA-256: e3b5e0149ff74887c3024298f334cef9d5c382d8c44fbdb788f319c57e023697
116 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness, with a high heuristic score for malformed exploit streams. The embedded URLs suggest a phishing or scam lure, aiming to trick the user into downloading further malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://baarspo.ru/strik?utm_term=3.5+planar+binding+handbook PDF link annotation
    • https://cdn.sqhk.co/sovanoniwuva/ajbtUis/value_proposition_canvas_template_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pijavagoke/NqrCiji/wimerajegosevisixujoti.pdfIn PDF document text
    • http://moymagazin.xyz/305802901068luq7.pdfIn PDF document text
    • http://winoorama.site/56599311458n7fn3.pdfIn PDF document text
    • http://antinomi.design/if_you_like_junie_b_jones_tryh6s5g.pdfIn PDF document text
    • http://fortuneo.biz/hentai_girls_stripuiupl.pdfIn PDF document text
    • http://3bureaureport.info/how_to_connect_multiple_devices_to_jabra_elite_75td96eg.pdfIn PDF document text
    • http://fakts.design/xfinity_stream_on_firestick_update2m9fx.pdfIn PDF document text
    • http://bred-enligne.com/vizovivumipuwinali2xzjn.pdfIn PDF document text
    • http://itanto.space/alice_in_wonderland_game_20105qhop.pdfIn PDF document text
    • http://optarfes.com/schwinn_bike_trailer_stroller_conversion_kitdr9mg.pdfIn PDF document text
    • http://tertov.xyz/5997942258zbt34.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/e2mhdig/fury_death_racer.pdfIn PDF document text
    • http://cetop.xyz/19208075704xeup8.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/jepinebawo/white_glass_christmas_tree_balls.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/david_roediger_wages_of_whiteness.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/cd_z_ramalho.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/blackberry_bold_9790_firmware_7._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7861b2d8-fca4-41cc-96e3-1457cc30d23b/bunopanevudafevidigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957c13a7-abb0-4e1e-b0a4-11179ccb4500/q_significa_taller_than_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/hisense_6500_btu_portable_air_conditioner_manual.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_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 5472 bytes
SHA-256: 35c6a3ba1fce64054a8dc2bc588a57b8a7ca408eb4e545cde640723dd1c72ffa
font_01_sfnt_off00011353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11353 11940 bytes
SHA-256: 44e55327b41bac43ec06414479fd98b2c66a463c0ba5b1ee2fc797d5a436f68a

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