Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b1dee6d051448a…

MALICIOUS

PDF

86.3 KB Created: 2021-09-18 01:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a8d2975fb2dc143490b504bfb1d805b3 SHA-1: c6a94214c74f15e4ab63a78ef379645bbf23aa9a SHA-256: 35b1dee6d051448acbf6f8d1fa3714932fa13db4f7b1ae7299e834b8a002e6a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to link farms, many of which are hosted on domains that appear to be compromised or disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=how+to+get+pvz2+chinese+version PDF link annotation
    • http://abbeytraining.net/userfiles/file/60677032202.pdfIn PDF document text
    • http://htwy.com/upload/file/pozefofonotaxukixezugezav.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1a621a828d5f9ce6a8ff0c52e5b2fce7/29385614955.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/52810182045.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/rodiwagimoko.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/77266771741.pdfIn PDF document text
    • http://epmachine.ru/d/files/87091532873.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/vozanomokej.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/dekumimukiku.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/4279360452.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/xobezulamulawabaj.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/40956332729.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16139447052df7---zidirozamelikalafebi.pdfIn PDF document text
    • http://ledins.lv/cms/file/ninosasikadumebex.pdfIn PDF document text
    • http://manu-transport.com/documents/file/78728066208.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/40491611012.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/gubuxa.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/pejiwififegijuza.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/95450934016.pdfIn PDF document text
    • https://marlschuz.com/userfiles/files/59043292455.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/97dedc95faad766ed8c02c44a2be3e6f/87757191235.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/57862238751.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/pikajugabejaxete.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_off0000e05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 10768 bytes
SHA-256: 69991de2763fdf40ea5e64dad65c6e66eae7654a3fad02b5389813a8d8eefe2a
font_02_sfnt_off00011152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11152 22232 bytes
SHA-256: cdaba3d3616a5877e4d4de53e1d86ccadb6dd019fa303ae80690bdbedf4237ac

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