Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a1d0eb61f77387…

MALICIOUS

PDF

77.8 KB Created: 2021-02-21 13:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7f24845c8c213be42a8b5ef22eb5b87d SHA-1: 06aa36d9330a6d9f40cc7c41310296700a991e50 SHA-256: e9a1d0eb61f773878a9b57bd8fc3d8200f15a98886c8979aba559fb29d94ed17
192 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that suggests a lure for a 'Gta 5 installer apk'. Heuristics indicate the PDF links to known malicious redirector infrastructure and is classified as malicious by an ML model. The presence of multiple links to disposable hosting and the overall structure suggest a phishing or malware distribution attempt.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=gta+5+installer+apk In PDF document text
    • http://healsmall.space/lajefoliwopoberokazi4c245.pdfIn PDF document text
    • http://steelsho3.club/samsung_j400f_modelt5co.pdfIn PDF document text
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/1902565.pdfIn PDF document text
    • http://gazzsheff.xyz/80368104223edspi.pdfIn PDF document text
    • http://tiximixisasosa.iblogger.org/70352861442.pdfIn PDF document text
    • http://gooddevice-online.com/taxejisabinuzizumix6b.pdfIn PDF document text
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/fotosafewuv.pdfIn PDF document text
    • https://jolevodib.weebly.com/uploads/1/3/1/6/131636654/nepimakoloset.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/nugezupuvojamijetes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupugavediroz.rf.gd/vuresukebig.pdfIn PDF document text
    • http://makatorujiru.rf.gd/jenkins_send_sonarqube_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/19262596039.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/kosegepima.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/evandoi_srivaru_audio_naa_songs.pdfIn PDF document text
    • http://dakokaxawizepu.epizy.com/consumer_finance_account_on_your_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/37074759965.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_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 5032 bytes
SHA-256: 846c33a67c513a15924b31335451cb980bdf8c7e1aeeb7676494c87c314e24ab
font_01_sfnt_off00010679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 10396 bytes
SHA-256: 48ebebd167648c13e4c4db5e4eb6de55fa47f55cce481a39e3fdbf962fd5d9c9