Malicious PDF — malware analysis report

Static analysis result for SHA-256 092cf3782cae6cbe…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 21:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 842708a8cfa28654d4cdc3dcbf59aaa2 SHA-1: cffeb943f219e649452db4231b5d6a22277fe286 SHA-256: 092cf3782cae6cbe1a1fbefdfabf65ece62d6e42e33f64909b06b45ec91eb5e0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://panel2conso.com/userfiles/file/mumozixuxixuzawelez.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613115bf88fd3---28610300825.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021091109532273499.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/peluxewoko.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/47763459664.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/26309005e5f04eb797d0bf2ce9671870/86696594488.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/97193727710.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/tafotemepuzu.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/5579019709.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/kapuji.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/6166228994.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021091307015380554.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/xobogosibakafejovote.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/fedejedifeduxu.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/27578457706.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090411115473499.pdfIn PDF document text
    • http://enricobarraco.com/files/mekuluvesasabo.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/89539928002.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/57041919741.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3ce48c261---92628601583.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/9c07d67544babbf1c3c75ccf641156a8/25887984064.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/xuzunat.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/tedazagomobebakegoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=june%27s+journey+get+unlimited+coins+and+diamondsPDF 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_off0000c34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 11084 bytes
SHA-256: 180e16a05fd08421065e5a9a70799a2d6aa7187bb8304368b0241d38f3216bc6
font_02_sfnt_off0000f517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 17572 bytes
SHA-256: 19e15cfc7d4af16374702f5d7ddaff51beb88646f97b3da0623d2c6f1d6aab86