Malicious PDF — malware analysis report

Static analysis result for SHA-256 8765c19caadebd50…

MALICIOUS

PDF

86.1 KB Created: 2021-02-28 08:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d07bb539a20944a62c129c8633181878 SHA-1: 9de96555e90558d08ca366d8db27b727048a2c9d SHA-256: 8765c19caadebd502e7969b033394e8d2529e27235e9f1fecf1cb72cff99a215
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to 'nipisod.ru', suggesting a link farm or redirection for malicious purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=dibujo+del+cuerpo+humano+y+sus+partes+en+ingles PDF link annotation
    • https://lotatodekimin.weebly.com/uploads/1/3/4/7/134705716/9749913.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/inRF1if/fishing_online_games_free.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/73c39fbfeed93.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/hgiaQyi/kepujovakanazexiburidug.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/gwid0ge/netflix_christmas_movies_2020_jingle_jangle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/paxuvagal/97282876138.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/mibeme.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/uc_browser_pc_offline_instal.pdfIn PDF document text
    • http://widuxetikos.epizy.com/moxubaza.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/bosanetudovonofef.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/mable_training_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/pangolin_laser_software_free.pdfIn PDF document text
    • http://fobilal.rf.gd/sole_e55_elliptical_2013_reviews.pdfIn PDF document text
    • http://nivosifif.rf.gd/96894750589.pdfIn PDF document text
    • http://zigatikix.rf.gd/fafowixomugepuwifi.pdfIn PDF document text
    • http://konevimojo.epizy.com/pemejimukisateregebugapo.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/periodic_table_color.pdfIn PDF document text
    • http://dinagujepapure.rf.gd/mamago.pdfIn PDF document text
    • http://padanejelupe.rf.gd/drum_sheet_music_program.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5688 bytes
SHA-256: 6aedbe0b3323267fa59dc0da39f4c2890ad037c9f47d1baf6ea253e71c16dbcf
font_01_sfnt_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 10972 bytes
SHA-256: 29b4c0cbbe83bf72432a826957852042aced6e6de21851f987f5b57fd26c7e16
font_03_sfnt_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 16104 bytes
SHA-256: 45a9d45584ce6025e1225e28cc38a502a022d5defc6af287acd8796dd2ea1153
font_04_sfnt_off00013b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B45 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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