Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02f07dd47465a6c…

MALICIOUS

PDF

75.5 KB Created: 2021-09-22 21:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7ba94ac18b27ef64f39a2bd6af3c16b7 SHA-1: 46f73282cf3bbf54c461dd2d5b50b572806d7192 SHA-256: d02f07dd47465a6c4a13a7463defca28d36952540ca4900ff94029d9838d8327
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of 'utm_term' parameters in some URLs indicates tracking for marketing or malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=subway+surfers+mod+apk+beijing PDF link annotation
    • http://qualityspices.in/ckuploads/files/dijomimumifodunizojov.pdfIn PDF document text
    • http://iphysiology.ru/upload/budifefovidak.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/vudapi.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/sapofixisewuwezakepopuk.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/57100760866.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/kigaxedodelusisejap.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5ac4e8940---23302115505.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210914_8B5781BC2CCFC943.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/49659405696.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/65209824638.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/kakepililovoxurumokununa.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/dujavaxosapitawodesep.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/kokifevenalolemobebitipe.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/35384879103.pdfIn PDF document text
    • https://adikkedua.com/contents/files/fetaxikodomujagutifewox.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/tetapo.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/10354455825.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/40477913938.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/13764395294.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/lomorelavujadoruduj.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/wobusipavon.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/18150895137.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/vonareraxisexu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c76905ea7ce169a512e92bd280dd2687/raladavotarora.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/buxivukelaxevofovowu.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_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 11432 bytes
SHA-256: 230d880077be3d71f6ccbc2d8afdf084b4c0cd92543ee3b207112247aad4652d
font_02_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 17092 bytes
SHA-256: b2cf0fd971815676d2194d6e1c998490b73278dd638c41fa164372bdd755f55c