Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d652d15a4a2d50…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 15:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1f05ca2fa9a590a7d4a8846ea8e2689c SHA-1: 1e15dbd2e6d3fed2e6dcad4dd0d0281406f9deb8 SHA-256: 26d652d15a4a2d50b729981f3e78780471cfb40a3bda70812cc415d4dca420d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external links, many pointing to PDF files on disposable hosting, strongly suggests a link farm designed to redirect users to malicious content. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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 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://garglob.ru/uplcv?utm_term=how+to+bypass+wifi+login+page+on+android PDF link annotation
    • http://sententtech.com/file_media/file_image/file/37976528461.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/bozejoror.pdfIn PDF document text
    • http://greenflameenergy.com/userfiles/file/karonofeno.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/98736595150.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/rudobipatipotan.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/5562017258.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/35963927878.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/bojadapet.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/93207557857.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__614335FED3BEE.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/42016302c90432f50836382508b6bc42/mekawixurovi.pdfIn PDF document text
    • http://www.pilartangguh.com/file/kedotazoditumusigibomu.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/madawudavinutemim.pdfIn PDF document text
    • https://sitarasign.ir/data/file/semoxudofi.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210922154652.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/18397471131.pdfIn PDF document text
    • http://bptramptour.pl/files/file/50592479779.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/sowobipipivalofuxomukepem.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135308c4afdc---domixek.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/10812018709.pdfIn PDF document text
    • http://capital96.com/userfiles/file/wubazumusegodokok.pdfIn PDF document text
    • http://keacg.com/upload/files/furigelepukawewapetataju.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://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_off0000ad8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A1 15768 bytes
SHA-256: bb907cfb78d78bda2792036d4495d010a4b5aee5ea5bda02f692ea9699f8b087
font_02_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 11004 bytes
SHA-256: 88e3cc7159ca650da2a7f08ecdc0fab797736bbe6013461775cd058d98d79a13

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