Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cd3ddde59d3970…

MALICIOUS

PDF

131.6 KB Created: 2021-03-08 22:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 93a151d31b969c6d46501ac816ad95d7 SHA-1: ab1790d46b36ab54a8fb4d0cb0436ddd44c4f825 SHA-256: 19cd3ddde59d3970f254941bb71e3c11b62f64bd953f6f6f7407264fea3f7b68
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or link farms, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest malicious content, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=2015+chevrolet+malibu+repair+manual PDF link annotation
    • http://uchebnoe.website/minecraft_zombie_survival_mini_game_server6zg4c.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/lijubu.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/ropobifiwina.pdfIn PDF document text
    • http://boothattendant.com/tifegijedevuwobuwikenaxu74eqj.pdfIn PDF document text
    • http://natikolom.site/1157102925885dk2.pdfIn PDF document text
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/5ca85053eb.pdfIn PDF document text
    • https://xubisimas.weebly.com/uploads/1/3/4/7/134769706/eae48.pdfIn PDF document text
    • http://kasaxalelari.iblogger.org/34120330226.pdfIn PDF document text
    • http://babblescoop.store/52716930150fy6f5.pdfIn PDF document text
    • http://ionatr.space/what_are_some_environmental_issues_in_south_americaek9ju.pdfIn PDF document text
    • http://wazasutosas.iblogger.org/37635876203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://depepok.rf.gd/walmart_tires_service_hours.pdfIn PDF document text
    • http://lunujebof.rf.gd/calculate_the_centroid_of_the_shaded_area_from_figure_1.pdfIn PDF document text
    • http://nodufezazu.epizy.com/blotter_report_philippines.pdfIn PDF document text
    • http://bopufadepop.epizy.com/zapipevafogagijerip.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_a3630773b2624e9584cc7e7b9d668729.pdf?index=trueIn PDF document text
    • http://babupit.epizy.com/15129062742.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_c2a1c140140440ff9488224031b1e39d.pdf?index=trueIn PDF document text
    • http://norisufa.epizy.com/popcorn_fundraiser_flyer_template.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_5f9a5d988a004e3095f0d4c77ab1d907.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_7e2792658e374ebaa51f986ca21aa3d3.pdf?index=trueIn PDF document text
    • http://resisimokopi.epizy.com/cercle_de_la_forme_bd_diderot.pdfIn PDF document text
    • http://momunubaj.epizy.com/coso_framework_2017_checklist.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_1c45af1c5c9f4e3fabc685066e600b54.pdf?index=trueIn PDF document text
    • http://fanofajuduma.rf.gd/windows_media_player_free_pc.pdfIn PDF document text
    • http://wiwazisumi.rf.gd/cuantos_tipos_de_grupos_etnicos_hay_en_el_mundo.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_off0001c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C94B 5552 bytes
SHA-256: 1ca303a90e91b909719ed5b2a554284da0c2dc0b00f892f8a5ad98ebd1545b56
font_01_sfnt_off0001dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC0B 10768 bytes
SHA-256: f8423336328c63613a071de43c18e86fee210bd1946a1248a9e2902ad31f1fb2