Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04e627023040255…

MALICIOUS

PDF

101.9 KB Created: 2021-06-26 00:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a14380921329bf8ecf11b337e5b4b3ea SHA-1: 9fd4f0bb1c5a7c3a1b1cab3313fc6d60728f551b SHA-256: a04e627023040255f2080d94850a24876f3d513a2a9295aa71ef123a6fb8c8d7
156 Risk Score

Malware Insights

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

This PDF file contains a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 http://kipia-nn.ru/userfiles/file/91224572224.pdf
    • http://shinies.ru/img/lib/file/kefesogaki.pdf
    • http://1hozain.ru/files/userfiles/files/26282661137.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/35ot4ee6k04vhiapq8vdn57qsq/36391233857.pdf
    • http://guoyangmoju.com/userfiles/files/fetoxafadedenowevaki.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/mlipb9tncnr2qa8e3f0e3pv94v/jufozilisifumoz.pdf
    • http://happinessgown.com/upload/users/files/savominoneverozubu.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a864ded38c3---wegovasiwosovipiwezigije.pdf
    • http://grupopiscis.com/upload/files/394697436.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422667ebaf---54000661981.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/lsmvb16m79h1t8hs9u6m2j9u6u/45092254215.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb7fbf14e---82224673274.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb6dd55276---60335923851.pdf
    • https://radmangroup-ye.com/rgfiles/file/disisubalupedenexi.pdf
    • https://avgdesign.com/userfiles/file/kimetutomapesinezumabe.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/is9kfg7pbbjnv46ga81nug65ac/66246927650.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/94578d82947d992a49e1f9d7e6edd36d/31992323483.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/26855474679.pdf
    • https://sunarchegypt.com/userfiles/file/35952507120.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a796eb04a1e---vewejipejal.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/s2obf5r0bqctihpodtnrd41bbo/74255272490.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cr9mg2hi26b5kb9es638v4l43/69050411532.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=goblet+of+fire+online+free
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bf0.bin
bfe3d763ddfd1c098fdd00abec3cad666f4fa4f2e818581902951f8f330a523f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 18584 bytes
font_01_sfnt_off00013c6b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6B 16792 bytes
font_02_sfnt_off0001547c.bin
d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
pdf-font-stream PDF embedded font (sfnt) at offset 0x1547C 16280 bytes
font_03_sfnt_off00016a94.bin
e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A94 1784 bytes
font_04_sfnt_off000172fa.bin
0eb56967466ee0758d5942dd857060c6b278a3787329c8727944e5f2b9e6e626
pdf-font-stream PDF embedded font (sfnt) at offset 0x172FA 10056 bytes