Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9312215ec8dce90…

MALICIOUS

PDF

91.3 KB Created: 2021-01-09 19:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c81e5678070405711eb33a1fe7e35c91 SHA-1: 191a8e672038d7b9a3910d4a81affa5dd48dc0d4 SHA-256: e9312215ec8dce9079221cc0fceb9fd366ad15bbca3d2d1553575b6eb79f9239
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=eberron+airship+5e+stats PDF link annotation
    • https://site-1173403.mozfiles.com/files/1173403/79210186275.pdfIn PDF document text
    • https://site-1195189.mozfiles.com/files/1195189/zeus_and_roxanne_dog_breed.pdfIn PDF document text
    • https://site-1178466.mozfiles.com/files/1178466/true_skate_all_parks_free.pdfIn PDF document text
    • https://site-1195597.mozfiles.com/files/1195597/6888981655.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/pirozigapemilepof.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/lighthouse_church_of_all_nations_alsip_illinois.pdfIn PDF document text
    • https://site-1217489.mozfiles.com/files/1217489/tilotene.pdfIn PDF document text
    • https://site-1198856.mozfiles.com/files/1198856/rifinolixikeworidez.pdfIn PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/26921318290.pdfIn PDF document text
    • https://site-1168169.mozfiles.com/files/1168169/class_10_maths_rs_aggarwal_solutions_chapter_11.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/nagev/mantrap_lake_mn_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/blastula_brain_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/read_n_quiz_jmms.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/rosary_rosaryo_tagalog_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/vorumase.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_off00012935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12935 5096 bytes
SHA-256: cf2874476b5a6adb308fc37a10eaaed5bbbdff5e734af8ee7f815e4267393935
font_01_sfnt_off00013a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A81 10976 bytes
SHA-256: 27ebf94d0f7707d4f4d0f5949af74dba2cf52101726363a4b6de20ce5ffa7665

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