Malicious PDF — malware analysis report

Static analysis result for SHA-256 e693baa258c6b229…

MALICIOUS

PDF

80.9 KB Created: 2021-03-16 21:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a9302c0d4d4e1082b77b74768e87b0c1 SHA-1: e9e7cac0851703f0bfd7371e77f5e0d3b8487471 SHA-256: e693baa258c6b229c62d3d336e355c88c98cb6dd21d484e81ed3e5c6386c4056
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious websites for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of malicious links.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/wix?keyword=isometric+drawing+worksheets+free PDF link annotation
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/toxebuni-xesatagafinow-xifogalovaw-kezubiduxuk.pdfIn PDF document text
    • https://serutoposax.weebly.com/uploads/1/3/5/3/135398922/wekujitagij-totuw-xanefenudofe-pogolowewozimo.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/d3Ygjji/juventus_vs_novara_man_of_the_match.pdfIn PDF document text
    • http://xulikugo.iblogger.org/28875812043.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/hiImxjh/stars_live_wallpaper_picker_apk_lollipop.pdfIn PDF document text
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/1727096.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/F1PoGjf/learn_french_book.pdfIn PDF document text
    • https://bofuvozera.weebly.com/uploads/1/3/5/3/135331850/267462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudosikewemer.epizy.com/47067483283.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/50415372186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0a26b4-a752-4835-8e63-c86bdab70406/wemizovuzuju.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/anth_movie_sunil_shetty.pdfIn PDF document text
    • http://pixagikaw.epizy.com/73020711789.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/naraxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd880db-1708-456f-8c41-c2dda066c68d/rinubapetikolarorezewipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1890cfa6-2a70-4cf7-8fca-a9cb79d7287f/joy_luck_club_book_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/iso_9001_clause_8.5.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff89eb9b-1a4e-4fba-9adb-601d740cac98/gatokavovovitowodosinite.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/what_is_rawls_justice_as_fairness.pdfIn PDF document text
    • http://lebodevafetag.epizy.com/char-broil_3-burner_natural_gas_or_liquid_propane_gas_grill_with_side_burner.pdfIn PDF document text
    • http://jogakijifif.epizy.com/is_cyberpunk_2077_worth_getting_on_ps4_pro.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_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 5496 bytes
SHA-256: 4ef1b1c7adf2604de9a6b60c9e2046592c11dc151a3acc4d4bcba45631552dea
font_01_sfnt_off0001104e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 11420 bytes
SHA-256: 005b3e2c2297f4b08d823c01e8afdffe379e5a6795a660887ddffc97fdcd612f

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