Malicious PDF — malware analysis report

Static analysis result for SHA-256 2520a1335dc35ab3…

MALICIOUS

PDF

76.4 KB Created: 2021-01-31 04:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 64147d751df44f0cf59ab47d23d4cf71 SHA-1: b1a9694207da807dbe477f76f2a9dfa790f412c3 SHA-256: 2520a1335dc35ab3bce2bc103fe2e9d99c376300d4c1e1c3c1f1ea1541459893
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain metadata related to an 'Apple earnings report', likely used as a pretext to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/aws?utm_term=apple+earnings+report+q3+2019 PDF link annotation
    • https://jabekidedur.weebly.com/uploads/1/3/1/6/131636775/398361.pdfIn PDF document text
    • http://wiregabjuk.fun/hideous_destructor_mapsjqdyf.pdfIn PDF document text
    • http://winoorama.fun/80138647788i6jqx.pdfIn PDF document text
    • http://kinoxca.xyz/kijuwejufivupukycie.pdfIn PDF document text
    • http://oneitshop.info/munugifufexepomaribevafxej4m.pdfIn PDF document text
    • https://xawewidijaxiju.weebly.com/uploads/1/3/4/2/134266046/rabexegotamaxik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fe75bef53e41.pdfIn PDF document text
    • http://theboldpantsproject.com/644848076226sn4x.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/beforapejobidudal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5fee8e157bdac.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/94b9a144d54782.pdfIn PDF document text
    • http://fomuvegikutidob.iblogger.org/bisumanikope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://latilofu.rf.gd/singular_plural_worksheets_for_grade_1.pdfIn PDF document text
    • http://vevemaj.rf.gd/dananerodazixize.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/zalerefisamifaduvalapi.pdfIn PDF document text
    • http://nivufebolira.epizy.com/bericht_schreiben_grundschule.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_off0000eb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 5748 bytes
SHA-256: 332df69c6393eaf4932d589ab2d88625f2205cca505a47d2844136aa7de825d7
font_01_sfnt_off0000fecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 11072 bytes
SHA-256: af5a1c54a81985782a55e7a5589e7c0aa20f7af3cd337dfd67cd3343e4a308b5

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