Malicious PDF — malware analysis report

Static analysis result for SHA-256 701e0610ab8b7ced…

MALICIOUS

PDF

80.5 KB Created: 2021-03-28 01:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ca5b67e8733a70cf76a4b2a5ae2a08c SHA-1: 51d7566e190caf6fba0540f5c48341790d413049 SHA-256: 701e0610ab8b7ced1969e22b01d8f5ddd1a813663b9fe9c8822ff3394c1e3b6d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to various PDF files, likely intended to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=biopsychology+john+pinel+pdf+free PDF link annotation
    • https://vomuribo.weebly.com/uploads/1/3/1/6/131607062/5270521.pdfIn PDF document text
    • http://rodopigigixodak.iblogger.org/cerebral_palsy_types.pdfIn PDF document text
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/f20a4ee971cf5ca.pdfIn PDF document text
    • https://pejadalat.weebly.com/uploads/1/3/0/7/130775017/2108859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_5fe0e4172f038.pdfIn PDF document text
    • https://lexifodupep.weebly.com/uploads/1/3/2/7/132712330/bepezuxowobupagivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fcf255015a24.pdfIn PDF document text
    • https://rawewefugu.weebly.com/uploads/1/3/4/3/134394717/xubot_lejuzasev_temazupenev_rovunuker.pdfIn PDF document text
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/e227c70e13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5fc9a3a7e0ca0.pdfIn PDF document text
    • https://vebokupamo.weebly.com/uploads/1/3/4/4/134494409/tutegisigifitis.pdfIn PDF document text
    • https://lonuxomefuju.weebly.com/uploads/1/3/4/8/134871759/77f98c2b782f39e.pdfIn PDF document text
    • https://gizivesokopupa.weebly.com/uploads/1/3/2/6/132696604/sivatefonovewix_kidilewibo_ruzawuri_zirikimagelimo.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/dezumodinemiwom.pdfIn PDF document text
    • http://tigobari.iblogger.org/verufizujerivex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_603e1a7bac8e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_075243bd64c8484f8e6dbd2be64f9c58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/kudapil.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/42356124484.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_f1cd881bca5548cd8d50c4d8607807bf.pdf?index=trueIn PDF document text
    • http://sixanuramusasit.epizy.com/50_shades_of_grey_movie_sequence.pdfIn PDF document text
    • http://ruboratanon.rf.gd/44973696553.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/63490217668.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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5432 bytes
SHA-256: a82fe8b9ae21c8acd124a230e1161e347e5ec9a80b8a6d44d2bfda782c30d06d
font_01_sfnt_off00010581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10581 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0E 11168 bytes
SHA-256: 7d083f71b3e3a7d1b468a4baec1da0235136d09b8c73f2b0274433f1b12f0e02