Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d0dd4da724197c…

MALICIOUS

PDF

86.6 KB Created: 2021-04-25 09:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a21bb2308b8193391c905b8d04ea6275 SHA-1: ced27eb04c37acb58db5aaf3e550273ec92e05cf SHA-256: 84d0dd4da724197cd3094f6adcbefb780eb5964f71af08cf2938043ecfdd23bc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting it's designed to direct users to potentially harmful websites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://ponafet.ru/strik?utm_term=jump+force+dlc+characters+not+showing+up+xbox PDF link annotation
    • https://cdn.sqhk.co/serodozire/AEUjcLG/jurassicraft_wiki_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/EhdNhcd/82599681350.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/jHHdjbO/radiant_defense_perfecting_liquid_spf_30_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/EIgi4ge/66693674429.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/jiZ8xje/fomekabul.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/noxemunasu-sovin-vufepe.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/D2dvUjg/31996701477.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/dGYgfjY/best_tamil_rhymes_video_download_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/igMWIja/jejorugurutanon.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/ilZidSk/msu_texas_start_date_fall_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/cIx9dgi/joy_of_baking_chocolate_cake_ingredients.pdfIn PDF document text
    • https://juximejejin.weebly.com/uploads/1/3/4/3/134365908/vesigiwefemadi.pdfIn PDF document text
    • https://cdn.sqhk.co/zavufepugife/fZjbrhd/weather_app_iphone_air_quality.pdfIn PDF document text
    • https://cdn.sqhk.co/govupasuti/Wtoieia/monroe_doctrine_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/nafadilinozo/aNhjrif/85605605971.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/hjeEoEl/14864069548.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/mieLheV/65217631555.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/5028937.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/gorajikunobixi/98520297849.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/94008162589.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/54635142416.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/war_is_a_racket_original_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/angularjs_formdata_append.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/11355618827.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/votoresumuzegamiwil.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/english_grammar_worksheets_for_class_6_cbse_with_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 5740 bytes
SHA-256: 9ead2202a28feddb4c7c32b26555827efc10e7fb70c798f03362a5db337b5d0b
font_01_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 10956 bytes
SHA-256: 7efa01f8522d7760815b5eccbe1c738cd95435d64b1f3441a1a49844832ca8b9
font_02_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 16100 bytes
SHA-256: 535cd04ce15d768c7a65db1bbbb6c7c9a1128d8b3cc492e08505416fdb5613e3
font_03_sfnt_off00013d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e