Malicious PDF — malware analysis report

Static analysis result for SHA-256 86496574fc955fda…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 00:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e4438e6e31811cb6bb62d0c327151968 SHA-1: 640f2a2d6b856d42fbf3fe4eb4620c5ba7a41745 SHA-256: 86496574fc955fda2a5ac8128ba3ae2e6e8a18a5008d36366fe2dda89d8186ef
104 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, some of which are suspicious, suggests the document is designed to redirect users to malicious sites or download further payloads. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the phishing or social engineering lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=14.1+human+chromosomes+assessment+answers PDF link annotation
    • http://dkblogin-de.com/77295382676wwrhq.pdfIn PDF document text
    • http://b4shop.icu/mabajoduxijamaxasiratoo5cnd.pdfIn PDF document text
    • http://kfcrabota.ru/jio_mobile_ka_video_calling_apps6zxsc.pdfIn PDF document text
    • http://peuer.xyz/fibugimasenufunanibokakurmcl60.pdfIn PDF document text
    • http://fb-ig-violation.com/2047443482838jhh.pdfIn PDF document text
    • http://cocobeautybar.ca/me_before_you_book_parent_reviewwgr4o.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://meetsol.xyz/kulimixagimvqm85.pdfIn PDF document text
    • http://iranianvc.com/napexurufanirumeparovqygf.pdfIn PDF document text
    • http://iuts.space/how_to_adjust_2_stroke_engine_carburetorlrg4x.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/mipeboro/benibarekutafobilupat.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/avengers_sheet_music_french_horn.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_e3cef00f7c8f4e49aeaa236306f5ce39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/how_long_to_bake_a_medium_sized_sweet_potato.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/how_to_do_joint_probability_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/how_to_turn_off_motion_smoothing_on_vizio_tv.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_2bca5bd9fab84040aa847d15ba06dd2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30f86dd-ce5b-4de1-afb8-aaf4ba3d7c6c/basic_english_worksheets_year_7_free_printables.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_e3d58a9a1b194bfdb62dd7b7733684fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04910458-c634-4284-abb5-70d568519031/computer_parts_price_list_philippines_2020.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_4400e7fbb9744cdea935052902f1b8a2.pdf?index=trueIn 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_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5176 bytes
SHA-256: 782c68526d99b85dae9a5e17c40cc4e481c6f1b5f5bd87fc0dcf57f8e55ba739
font_01_sfnt_off0000fc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4C 11356 bytes
SHA-256: 4e4b307b7756ec3a6e9471630b4478a7c9d1df83b533cff805deb173aa20952f

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