Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee741180ab22a255…

MALICIOUS

PDF

84.1 KB Created: 2021-04-04 01:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3385598cde0299413a476bd984d864eb SHA-1: 5a8fbf72d3a84fffeebbfec3e84cdea231551a71 SHA-256: ee741180ab22a255948ea1a946f525018a912a73e353a13e5018e048f6e14ff5
186 Risk Score

Malware Insights

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

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 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://golowaki.ru/wix?keyword=jazz+funk+dance+costumes PDF link annotation
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/bupijenofizetof_sitizadesu.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/1zC9Cjg/piwoxojetinokekep.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/what_will_happen_to_your_eyes_if_you_cry_too_much.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/YRdiehi/doctor_on_demand_psychiatrist_cost.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/ninotifafefanazej.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/72258371173.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/temisajunijurim.pdfIn PDF document text
    • https://gubepukabo.weebly.com/uploads/1/3/0/8/130873841/6ea25f4b343.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/SibBaid/bidon.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/wozasinuvom.pdfIn PDF document text
    • https://jesokalatozu.weebly.com/uploads/1/3/4/5/134591365/fipupa.pdfIn PDF document text
    • http://sabinemusewak.22web.org/paleforoko.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/Q9aujj4/township_of_washington_bergen_county_nj_building_department.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/noxaterunub_dekosafepo_jobemogunakivap_neribuliba.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/how_to_reset_samsung_6300_tv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ee73d1ea0377412c991d729ffe295354.pdf?index=trueIn PDF document text
    • http://lazewimal.epizy.com/42902607719.pdfIn PDF document text
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_c2e3615a041847ffa8da237111ea218f.pdf?index=trueIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_1d3a196242314abab49f9ff7d05294db.pdf?index=trueIn 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_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 5144 bytes
SHA-256: 52f9225b8198b96adb69e561023ac65ff493e381deaab635b8682d0b9b03f76c
font_01_sfnt_off00011e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E13 11096 bytes
SHA-256: 739b64e8453ca1d23850767e7e036fbf405a7f0688d74c4fec42d6687cfb62ce