Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0ea97b9c8cd74d…

MALICIOUS

PDF

74.4 KB Created: 2021-09-16 08:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8aa3be7aa14e1bbedeeb9adc27c1c279 SHA-1: 3e48f927ec42f4b5c662ebf38bb49a5ba80fc862 SHA-256: ba0ea97b9c8cd74d5b02b759c2aee52493d75f16d2ab3bf9ed810dab4af6b547
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cructi.ru/uplcv?utm_term=gta+v+sa PDF link annotation
    • https://livewireeventz.com/userfiles/file/98548351324.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccbd18482---207108984.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/08f5ff7f809536be62226774de6f9377/lozinotaxiloni.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/18302175831.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b41f654db---79839413076.pdfIn PDF document text
    • http://www.polni.si/Images/files/87027477723.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/14882226551.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/79507077539.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/tixiraturomiludifiz.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/jimas.pdfIn PDF document text
    • https://allianztc.ro/files/file/wukufima.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/35435988558.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/51461508625.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/xobararejitedi.pdfIn PDF document text
    • https://fasleh.net/Files/files/19406251508.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/povojotexog.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/91021573045.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1631480304.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/43304858999.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/86704136102.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413d8cf0ebc---xivotesulinufuxer.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/popenajikomujakefivuloko.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/fobude.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/0789ee1a29e113a0e3178b8b811f4b22/60746340199.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_off0000bfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC2 9612 bytes
SHA-256: 3353d2e1a70a5287c00308e49cebd5a535a759e47b67674690132106cb77c167
font_01_sfnt_off0000d4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B8 18036 bytes
SHA-256: a65e1b189e5b4caa868d1d3785c5a7f7b10e025f4465c6519c97e7303f7e6024
font_02_sfnt_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1