Malicious PDF — malware analysis report

Static analysis result for SHA-256 a674eccfe50a88df…

MALICIOUS

PDF

179.6 KB Created: 2020-11-24 21:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7952ecec1c58bb6355953fc3748016cc SHA-1: 1ea600885e18a38a5a770bdfc0ac64b6856bad4e SHA-256: a674eccfe50a88dfd56aed649d7a85dead08269af57f9a97826bb7a539680dc9
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm its malicious nature. The document appears to be part of a phishing campaign, leveraging a link farm on disposable hosting to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=voting+democracy+off+the+island+summary In PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/9051900.pdfIn PDF document text
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/surojorut.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/fa4ee.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/ed721a8e2ce9.pdfIn PDF document text
    • https://pudakivofuleges.weebly.com/uploads/1/3/4/8/134853743/72b05b839d.pdfIn PDF document text
    • https://lasaveba.weebly.com/uploads/1/3/4/4/134488520/lojowabatu.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/99a5161d5886c8.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/womebikofokuxeje.pdfIn PDF document text
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/be5935198994c.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/nunijemakivudiwomeba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/besafefaf/pejorowizumigagupunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124488e8-3fd9-4a48-afeb-e7ac1e2a5c33/73628743092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a379755-05a8-411c-b183-a95fb6696f8a/mesabawufutisunotipirebik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5117a115-65d3-409b-af3e-af783146bd68/75039101991.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/chogada_song_flute_ringtone.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_off00027dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27DBF 5500 bytes
SHA-256: b2c6fae534d1487b77ae2d285f6229b7432defb24374daeb8a7ce09d0470b2be
font_01_sfnt_off00029057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29057 15936 bytes
SHA-256: 0f414ecb5cb7a0cb526d56fa6eb471e2eac770af0edff2ee595e0b66aeb9eae7

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