Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a342fe4394775…

MALICIOUS

PDF

69.8 KB Created: 2021-02-13 22:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3a7a31c3f40c37c4733bfce610c01f13 SHA-1: 617a2ee73f94d347cb8be7010917d736af8a23da SHA-256: 654a342fe439477556cd80abb5e25f4f23591a2f42a1263fabdc573c766c9d31
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, characteristic of a link farm designed to distribute malware or facilitate phishing attacks. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it acts as a dropper or redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=jackie+jerome+rogers+instagram PDF link annotation
    • http://carluxepaint.site/kawasapipiw6cxp3.pdfIn PDF document text
    • http://vadonodip.22web.org/complex_fractions_worksheet.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/7407845.pdfIn PDF document text
    • http://securityverifiedservices.com/bolelixigdtqxu.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/gumevexekadi-zofoxufujiki-laminuvoguzido.pdfIn PDF document text
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/c99ddf66e.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/8081669.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/dinep.pdfIn PDF document text
    • https://tuwukodazoj.weebly.com/uploads/1/3/1/3/131383678/defewezikiviz.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/sixugu.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/e9fda.pdfIn PDF document text
    • http://hq-cleartv.info/1-_99_construction_guide_rs3_2017n9v9g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikelofov.rf.gd/fudijefonuwonomifivikaz.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/98975540754.pdfIn PDF document text
    • http://xafamikipu.epizy.com/bombay_velvet_full_movie_720p_worldfree4u.pdfIn PDF document text
    • http://fukorow.epizy.com/wuwidab.pdfIn PDF document text
    • http://wodebekafew.epizy.com/equifax_credit_report_free.pdfIn PDF document text
    • http://wedizakur.epizy.com/befugoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/cervical_cancer_information.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/towewizuvumodawesivovofep.pdfIn PDF document text
    • http://fevasakexelima.epizy.com/2330469049.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/tratamento_para_anemia_falciforme.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_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5216 bytes
SHA-256: b2b3090a20155e85b60f0952097b2aef07a98a5733e9e457d2acb795fd704e08
font_01_sfnt_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 12268 bytes
SHA-256: e161966afbd0fe354a4b9ff25e3973269122aa3bfdae8ed3f48864f2d229705d

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