Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0649f217b4b4b1…

MALICIOUS

PDF

78.0 KB Created: 2021-03-18 09:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3b9a13c3acedc164564926b372ec4992 SHA-1: ba2c32930254ad69d76834dc84cdac2f481d46a7 SHA-256: 2b0649f217b4b4b18bf19981b0f27b88eaa5369293b7c51b0cac265c11e32312
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://crophysi.ru/aws?utm_term=mitologia+griega+nombres+con+a PDF link annotation
    • http://odebayitrafikhizmeti.com/forouzan_data_communications_and_networking_5th_edition_solutions_ppt13e1p.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/nerabosolopovirufetobiwew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5fd20359ac043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5fcd34d497f0f.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/ja2heid/knife_flipper_mechanism.pdfIn PDF document text
    • http://politach.com/hp_officejet_pro_8610_-_error_code_0xc19a0013_missing_or_failed_printheadk3wqy.pdfIn PDF document text
    • http://zathkatow.xyz/cyber_discovery_assess_answers_20181b1tq.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/rutovilewafakerotugisewar.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/zisomobafukale.pdfIn PDF document text
    • http://robinmani.site/pipiridewepizosfwexz.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/f7fgcYx/59571841198.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/fiibjdG/kaspersky_mobile_antivirus_applock_web_security.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376857/normal_5ffa9d6579437.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/37516142833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/ammonium_sulphate_msds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd956c31-8fda-42b8-815e-76528db58ae0/23006174508.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/what_is_compacting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c94dd39-025b-4a36-a7e8-0d6012156624/xijidire.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_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 5264 bytes
SHA-256: ec53e9af3709d1378584fadd686c3985242295828b961ac864b911291d7a1579
font_01_sfnt_off00010410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 11592 bytes
SHA-256: ea4e6cbc86427529260bf14ee9ffa8794fc07dbe7da43249a3505630b8fc0fc9