Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e944481c966d93…

MALICIOUS

PDF

78.3 KB Created: 2021-04-02 01:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 80122287791a64457d78d04fdb93f5a1 SHA-1: b365ae7a209ac6b1524ff88a1f04f18f9d91bf95 SHA-256: 80e944481c966d93d23f2b0b19a1f5d1a87c530b259d8afbcd5bc6521cb5ce62
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm. The embedded URL 'https://resalured.ru/strik?utm_term=how+to+tell+if+my+vizio+tv+has+smartcast' is likely part of this scheme, aiming to redirect users to potentially harmful content or advertisements.

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://resalured.ru/strik?utm_term=how+to+tell+if+my+vizio+tv+has+smartcast PDF link annotation
    • https://cdn.sqhk.co/gipakegabav/g1blWgJ/root_android_phone_free_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/wgdihuu/wizigoxa.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/5422834.pdfIn PDF document text
    • https://ridivuxizoram.weebly.com/uploads/1/3/4/6/134633738/a29f88dc4f01.pdfIn PDF document text
    • https://togijiwasifuva.weebly.com/uploads/1/3/1/3/131398416/1930901.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/wdifgeu/tivuzutobakixutu.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/gfhfBif/pisunutuvisewo.pdfIn PDF document text
    • https://vobinuxidixuf.weebly.com/uploads/1/3/4/4/134471365/7882825.pdfIn PDF document text
    • https://fililajivivumir.weebly.com/uploads/1/3/4/4/134456316/betekuwaxulipodaze.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/Zuh4k1f/nanananitadoxobem.pdfIn PDF document text
    • https://bidiruvinevuf.weebly.com/uploads/1/3/1/3/131379477/4732584.pdfIn PDF document text
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/sunuwewe.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/gfjjayy/41870967082.pdfIn PDF document text
    • https://kevujabuguve.weebly.com/uploads/1/3/4/7/134745112/bevozexefolurom.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/fifhawW/deccan_merchant_bank_near_me.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://uploads.strikinglycdn.com/files/179e41fe-ab23-4bca-95f5-6b56c564dad7/gurimitekusitiwifefeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af95f1fd-3038-4744-a13c-5cf2f1264fc0/hobart_am14_parts_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58bbc46-0836-41c1-8930-a9e8682448dc/greek_god_names_male_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867d092a-3414-4e0a-96bb-d3627b9c4f26/dewalt_dw718_miter_saw_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959f7ba5-7394-4f76-9ba6-552d8a1cb804/ohms_law_problems_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 5068 bytes
SHA-256: 15c874b661ac59b8a301d6102d77c23c21ad319aef73f3c12f08e6d9a12479ed
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 11012 bytes
SHA-256: 39954381d4c1521d07031c4d98aab621dabb4837ff8d5b19b36feb65cfc81a7a
font_02_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3