Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e25bac080f5c71…

MALICIOUS

PDF

77.1 KB Created: 2021-09-18 05:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3294584ce17716632af42edf8099d57b SHA-1: 2ef485622fd33b5f0d59e92bb2765113a3e06959 SHA-256: 44e25bac080f5c710beb7b0db183c0465f413d236e387d7ebcd4d3f39fc5ba60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://cribpointonline.org/cribpointonline/userimages/file/8574607573.pdf In PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bibeluripopazitirewegem.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/bajobaputosazubumujogavex.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/bosapubipirepaki.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/14202558870.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/telako.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/96867745401.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/40812980544.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/zawivotoluruvefosojezixu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/70378604723.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/95670224169.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/kukinitufedaj.pdfIn PDF document text
    • http://krupongs.com/images/file/fegavikawasupanipurege.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb3e32b1ae---nazitasu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1f09948d0---72451931417.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/melupibizudavogatedezi.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/lowejorafene.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/92955260941.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/nezivug.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449c8119388---92024982596.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/98238971649.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/mozafa.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/juzuzozuxaxi.pdfIn PDF document text
    • https://phukienbep.net/media/files/43838497306.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/13918232452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=hum+tum+full+moviePDF link annotation
    • 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_off0000cab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 10000 bytes
SHA-256: e97bfe0d1cadd0ea39fd682b5436450a789d34957587cf5792d3a64f72c0160d
font_01_sfnt_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 17484 bytes
SHA-256: 15fff981f1702f36b67a4eb28fc1959f7e86cc80d337d3382a77e7bf7c820dc9

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