Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab345fbcf5a4ff56…

MALICIOUS

PDF

178.0 KB Created: 2021-09-02 09:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 35e3c61176681b701ee4a715c2781f3a SHA-1: 61c145695d526c0f0545011cdff3ec18fc5a4336 SHA-256: ab345fbcf5a4ff5618a5bfd7ccf66caee47f41918772746f9b63b9e972a97f2a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The presence of 'utm_term' in one of the URLs suggests a campaign-like structure designed to track user engagement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8058

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=the+vampire+diaries+taylor PDF link annotation
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/pewolawumemujarudodarawi.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903b1ea9167---62868344080.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20ff8c490---52380499933.pdfIn PDF document text
    • http://millecolori.it/images/file/noxerozokimabam.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/2f41039e5420d3976ed5ffb595335981/tefivi.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/20249171880.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/zumigotegodipagur.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/4b46a03f8fa719fe38b3eec9be37e57c/72486768788.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/47f12c5dfb212aa9ba1dc2c5fbf8d6ff/puvov.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/mifabufivotetoxamik.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/lokodafuzugaf.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59ce5b081e---63426123439.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160985aa3cedde---94935169342.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/jomezuxirori.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f6486517c---furovilerajuwuri.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/88459826010.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/bivumir.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/5ee597qcunau7q2l2imstkg2bv/58608408465.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/litukedefiverufuzosimafiw.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/402b744d9e4169d6d9239b1e31d80c8b/xikepebutopuros.pdfIn PDF document text
    • http://ndt-ultratech.com/files/ligusobinuruwidegisi.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/rukupujizuronevivifumirep.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/v1jkp4jsmagfdq3eu6uss35kut/pojovokojubujadejukitunal.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/difagez.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/37566072695.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210505124045.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/pirolixenenekez.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_off000254ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x254EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00026d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D05 10696 bytes
SHA-256: 1231a2dad750c663f04e6b61e90ddec4196c2574b91f9841aa25ba241cc5a0ed
font_02_sfnt_off00028594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28594 19328 bytes
SHA-256: 85a22ca572c145940bb2bec75f88a6c1bc53c9ec4750c4fa634abe3f24bb43c9