Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ade8585807dc3e…

MALICIOUS

PDF

90.9 KB Created: 2021-07-07 01:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3ae197bf702647f96caadf5be01cdbf SHA-1: 673140ac1597570771c71f126b4f385aad1eb4ed SHA-256: a1ade8585807dc3e89bd4d35f2ab62f664565292ed9bf2850386303c86c73d89
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/dfa9d8113bc60fa175b68d368700b0ee/jumejiduritebanalumo.pdf
    • http://asbazainville.org/userfiles/file/37119182363.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bbf0aed44---50724237692.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/zeselozutojizawadonuliz.pdf
    • http://alrabbancapital.com/file/files/zadokekujog.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/ae5952c09057dcb877de0592bc49860b/lutedabujinosu.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45307fbd0---35462451902.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5f555e1a6c91c90dfdb8376d05d8b31e/17969634530.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/cb57be1836c867a806e61d19eb5e5fa7/66423886636.pdf
    • http://cuadepthanglong.com/images/ckeditor/files/webunorevozafudimo.pdf
    • http://alexhoffordphotography.com/temp/files/file/53218218107.pdf
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/83446697463.pdf
    • http://adria-ex.com/images/blog//file/bemelujaxetifamom.pdf
    • http://dream-mebel.com/pic/file/xodetewiwodarazezegub.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084484bafeef---kufupikelatum.pdf
    • http://knshzj.com/CKEdit/upload/files/50574011295.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/nafm9ttcphb49dke66so16t570/niwujifogiligoxuxo.pdf
    • https://sportsslife.net/upload/ckfinder/files/wiriz.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1aae71ca0---gipamidirop.pdf
    • http://glina-master.ru/admin/ckfinder/userfiles/files/92490282325.pdf
    • http://fmi.lu/userfiles/files/fenurowovakaw.pdf
    • https://listapp.in/ci/userfiles/files/xoranevufolopetarip.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607783aa08d03---dezedakunivemaxiz.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092d05d498cf---27481170074.pdf
    • http://alphasigmaoverseas.com/userfiles/file/rinadosugujakitapexora.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=use+abhorrent+in+a+sentence
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e528.bin
438eeaba0da76198fc45ae9e586d1bac258743be0d051d232e81d172da807e0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 19032 bytes
font_01_sfnt_off0001176d.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 16060 bytes
font_02_sfnt_off00012c80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 16792 bytes
font_03_sfnt_off00014497.bin
73b9d688165ddce441dbc05f64fb816ab37f93bd2a56a6bf8fbf5c299524282a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14497 10428 bytes