Malicious PDF — malware analysis report

Static analysis result for SHA-256 613a0c3222d6d5dc…

MALICIOUS

PDF

71.8 KB Created: 2021-02-21 09:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b852690b8319f380aa366c577ca723f SHA-1: cf6384a2fd478fd8c55ff1a15cf2856a01d47b6a SHA-256: 613a0c3222d6d5dca81b34873cb9c8bec2627c698b77d77bdf58dc7809062988
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://jottigo.ru/strik?utm_term=how+to+dry+king+boletes PDF link annotation
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/sibuveboberab.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/9371653.pdfIn PDF document text
    • http://byseles.xyz/kozomimadugufavidiredom8mhlw.pdfIn PDF document text
    • http://fb-copyright-help-from.com/pdfmake_angularjs_jsfiddlex6f5s.pdfIn PDF document text
    • http://trokot-shtorki.online/latesozatoeu6m1.pdfIn PDF document text
    • http://raisinshq.club/virotekekedonilizeodcje.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/zNhfhhR/baby_talking_aadhya_apk.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/busexuvad.pdfIn PDF document text
    • http://grusha.space/56082869093r2hvd.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/wefedax_fapufupezukab_zeworanedid.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/jdk_8_for_linux_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/jbhbvwd/3d_sniper_shooting_games_free_download_for_pc.pdfIn PDF document text
    • http://gachihyper.xyz/complete_university_guide_civil_engineeringaex9s.pdfIn PDF document text
    • http://vuvuga.xyz/hp_elitebook_8540w_fingerprint_reader_setup5y8s9.pdfIn PDF document text
    • https://wovugijewinekox.weebly.com/uploads/1/3/0/7/130739614/nefimomikaku-bumowelutoveva-sobopav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowigefugitixa.epizy.com/dogaf.pdfIn PDF document text
    • http://dukerorute.epizy.com/razejimepibuviligedamufo.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_off0000dd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 5140 bytes
SHA-256: 4aaed31c6fd0552aef5536f33bc74ca9543d0a2749916b3aec61c5dbe8d2fa08
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 10408 bytes
SHA-256: 48a0e41cf5c9f57f7282268ca672a9a5b1aa9471ebbc48ed09624a2faaa4ae7b

Open this report in the interactive analyzer, or submit your own file for analysis.