Malicious PDF — malware analysis report

Static analysis result for SHA-256 6649fe729f69f7a2…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 16:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4a42c6838a63e25b292dc0ae725677c5 SHA-1: 8d052619aa79775132a5bda0caa73eb777530eb9 SHA-256: 6649fe729f69f7a29ff94abb957fed398c785a245ecabc9354d647d95525d85e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. These links appear to be part of a link farm designed to lure users into downloading content, potentially malware, under the guise of a game download. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16138e025bf062---mozopizimolajozokewezove.pdf In PDF document text
    • https://fratellifurloni.it/file/67114458111.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/44506412491.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/38483049474.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16130a254ef9a2---bobeguginutoxuw.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/jujujoxilepexazu.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/rojojolulakoxulare.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/7f89279a713b3a070eb9a90e40342208/kilutigixi.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wovisi.pdfIn PDF document text
    • https://mmtours.si/uploads/541087281.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/65515049966.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/630ff6949c805bcc268d68fe02bb7704/zejilajibepaluninevaba.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/nilalemewenogemigegebo.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/sigitikaxaxusekiwaxumew.pdfIn PDF document text
    • http://millecolori.it/images/file/jerevexodozexurekotipo.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/wilavobokuboxapo.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/97802828740.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630742230.pdfIn PDF document text
    • https://citytrafik.nu/images/file/tufem.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631577678.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/84878663015.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/48204982867.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/vajemaweraxemelosi.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/teferipowadogokuwoxidola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+mortal+kombat+unchained+ppsspp+highly+compressedPDF 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_off0000b22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22B 11492 bytes
SHA-256: b67fe3460e1abb60527fe8122f6c13b4a9cf598d830432fcfd4e700bee34573b
font_01_sfnt_off0000cccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 15532 bytes
SHA-256: 036a93d31eafa0599c4257e05dea5746b7268b9b208b4219ff1d181d27192f42
font_02_sfnt_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.