Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfda2d1116c75a35…

MALICIOUS

PDF

90.7 KB Created: 2021-06-29 09:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11998eda6f7241d5f1cfe387f82d8627 SHA-1: bb11f43033c6482472eed09514e5a4b0298ba02d SHA-256: dfda2d1116c75a35bf96ea52c0478f57b55ef725897866b6db12e293972d61ef
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/q582pbgat7e25daia6t49368i1/luwaxofebabagepova.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcd3c7ab1---luwazajumitavemibugexen.pdf
    • http://jhferry.com/data/fckeditor/file///dezirigokoxezubiwajedibi.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/f764ccf8a2a8931ba6afc09bef7c57a7/52899407854.pdf
    • http://pronobile.de/catalog/file/zumivofo.pdf
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/kubunabuzipewanuxud.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780335122b4---tugimavop.pdf
    • http://ychnjl.net/userfiles/files/59409564773.pdf
    • http://toshiba-center.ru/uploads/files/79760235475.pdf
    • http://pcserviszlin.cz/ckfinder/userfiles/files/39493217125.pdf
    • http://costruzionibulagna.it/userfiles/files/23489171709.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078410ea0d18---zuzujabojenuvu.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea304de01c---wotomezadimo.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/of1i3cjjstbi0rvu03sjfjmrks/pifide.pdf
    • http://alpha-th.com/userfiles/file/tedidepugobigupurufaxoxot.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072d617afba8---rerogojakevilotiturelo.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/53kg2vchvgnrbfeku4q9qpnq48/janagavejidupidewevofifud.pdf
    • https://anmoul.com/userfiles/file/gusolivanitidujomebive.pdf
    • http://collegium-connect.nl/ckupload/files/46373662695.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/eq7dk8ogtijuuric995tbg8dc3/81419351272.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/106b994bd6534471682454ce8a1a0d06/2249023922.pdf
    • https://najlepsze-w-polsce.pl/uploads/55135211239.pdf
    • http://al-bandak.com/userfiles/file/vafugewijiwawizez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+much+tequila+does+it+take+to+get+drunk
    • 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_off0000ff1a.bin
34bbabcc411ff9f1d9d2527d8d65f8972160c2591db592e12615fff784afb0d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 17352 bytes
font_01_sfnt_off00012bdf.bin
9bd846989e33c7046dd81467138ba2fb4c01f635d6ea4aeb78f1c5d560c24af1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDF 11232 bytes
font_02_sfnt_off00014585.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14585 16792 bytes