Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02b97ff2032623a…

MALICIOUS

PDF

74.4 KB Created: 2021-09-05 02:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e56a04faa4528d2778f67b2244cbe37 SHA-1: 265c2ee4e5810cfbce5ee77a53b574bc248e7ec3 SHA-256: b02b97ff2032623a74facf9528c24c3cc3e57789f78d8d665be7a372becc4321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous links, many hosted on compromised CMS uploads or disposable domains, designed to act as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://kirilmazbardak.com/userfiles/file/fofogowuzo.pdf In PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/732764325.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/52218772114.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160857c9ce8f06---47346569392.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cba079a3560---nisokosizen.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/68214438173.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2t5ab60b2faldlqi0t1cud36o1/sedisaxedozaxovijune.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f4b35612---dakurosiledifow.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/11048235177.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/rixavenut.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/88995026086.pdfIn PDF document text
    • https://etadelloro.it/images/file/tikujumewulis.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/sebexenape.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fe753a03410---88351011694.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/2761064040.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/17e0587b4c88164c6622cf87e3e360a0/74082970254.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb51d0b472---towozezodatozidirisatu.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/69257103644.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/80759447525.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/52550106851.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a112ba9402---kubopok.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf3bb1679d---wotolopedigazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=bs+botany+books+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EB 16420 bytes
SHA-256: 40efcd8aa94d1d3400084737f0f71f78f5596ecb3177f731a4376dea5c05ae11
font_01_sfnt_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 10520 bytes
SHA-256: 7795314093b9ea20b46d3170b3ec3e2a2cb92e72cf00c8ef6295bd258817c65e
font_02_sfnt_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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