Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb7e6c3253e1266…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 02:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de0ea5231fd1d64159a962c5ca5f6486 SHA-1: a84c3bb19d297080db04911540fef3a0ed94bd6c SHA-256: afb7e6c3253e12660635413d3356e228295c245262c667ccc843bd729031a290
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs, with one specifically pointing to a download lure for a 'battery widget'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://synerhu.ru/uplcv?utm_term=download+battery+widget PDF link annotation
    • http://bodybybodyology.com/ckfinder/userfiles/files/42632093165.pdfIn PDF document text
    • http://agrion.org/upload/fichier/famijebisefi.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/59266902763.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/komemurewomonudoz.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/supipegibupur.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/44451559258.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/75559898602.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/33070394653.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/vedijapapuzirokidozo.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/kirewo.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/xijiki.pdfIn PDF document text
    • http://arablift.net/userfiles/file/rolij.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/telowofugi.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/89956131190.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/kubusidimasaputedofev.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/betofo.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/48371831825.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/67880775378.pdfIn PDF document text
    • https://invest.pl/userfiles/file/nomorexeji.pdfIn PDF document text
    • http://gibisch.info/files/files/gawijigusoke.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/2045491105.pdfIn PDF document text
    • https://ags-car.com/upload/files/99845911514.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/65811112101.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_off0000ad80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC597 10596 bytes
SHA-256: ac5cc4b0532e368f0b2752291b8a22f0d1d2bc1a023806b31db20ec7a22ac106
font_02_sfnt_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 14604 bytes
SHA-256: 10ae6b5403a7adeff8b22c3806828c8f9508c040b7efb8bf7954dcf26e6ab0b7

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