Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1749d8199e12db…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 00:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1af25357e473227f96fa484c2edcfaa0 SHA-1: 832eeff388062a4380decde7dccac0bbd82ea11a SHA-256: fa1749d8199e12db0c35775aeea24c4c8661455ce24ab76dd4e0d9a29c99234c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://boumqueur-edition.com/upload/fckeditor/file/11437098973.pdf
    • http://mwflower.com/upimagesfile///2025079577.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/msj2kj6pjgppnid44onnjduhbh/21749789051.pdf
    • https://syntellect.ru/Repository/file/rifede.pdf
    • http://wooshin.kr/uploaded/file/183471427760a677f26957c.pdf
    • https://sce.tw/uploads/files/60cf11fa5552f.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608693ef7de22---vojejonedijoxodeziz.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ae26b63a1---35374936396.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/29bb176b2dcf8c4138b4a64b9fa948f2/zesudotodasen.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723fee04f54---bazarizipizobenuj.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/98592659350.pdf
    • https://hssanesteban.cl/files/34251599731.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/nooffc8s8vt3r3ibgcsnqo5uh1/69898707409.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87a6e26a2e---dafapo.pdf
    • https://best-label.com/upload/files/zizitegiruritirekowow.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/t16dnk0hb7hranvh8lk2otd3aa/76810839567.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609688f3e4fd2---kokuguv.pdf
    • https://turbooto.vn/upload/files/71856881351.pdf
    • http://ge-mak.com/files/fijavizigajemixiburizubaj.pdf
    • http://palenice.net/obrazky_clanky/file/xikugebisim.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7cd4dd537---kezimiboguti.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/utdv6bnk2hhnqnmonqbmb6ivv0/21171485725.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=calculus+9e+purcell+varberg+rigdon+solution+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e588.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 16792 bytes
font_01_sfnt_off0000fd9a.bin
0d4515d7bd002c3c8e0d1b932fc1301931bbe945ebbe144b50c77b0476088572
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 19800 bytes
font_02_sfnt_off00013377.bin
3d2fc688729a3f2ca3309c9ead2a6e98213db81b66c3cfa25b545e3dc33dc370
pdf-font-stream PDF embedded font (sfnt) at offset 0x13377 11300 bytes