Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1d36b2fc1fbbca…

MALICIOUS

PDF

83.7 KB Created: 2021-09-20 12:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 329569de8b25beca40c4c3edf77ee725 SHA-1: d79232ff1bd582e82f9be32f1af52818f715ecd1 SHA-256: df1d36b2fc1fbbcaf4a485da70afcffabd1460db6ee206b1cd6a4c7e354d15f4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://frangarcia.eu/upload/file/folisulatojerenadifafal.pdf In PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/39750981753.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614168d23f7c7---tazemoruvetaf.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/12576825338.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138e400a27a1---89693548930.pdfIn PDF document text
    • http://annabarons.com/files/files/gunijurinomegi.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109201309583999.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/75993468489.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/subetevedajok.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/49263883946.pdfIn PDF document text
    • https://proia.bg/userfiles/file/61531396901.pdfIn PDF document text
    • https://petribax.com/userfiles/file/sazewonufazisosedutitolu.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/78507324347.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/begejolojuv.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210914185308_79rv28.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/55387149171.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/72257743665.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/34311157548.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/1728802131.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/jukamuzipofemodofafavexed.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109191205221134.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/vugowizije.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144d880019f3---fefutu.pdfIn PDF document text
    • http://kaies.net/upfiles/210910091627576799g7snug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=turkish+movie+app+with+english+subtitlesPDF 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_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 19352 bytes
SHA-256: e34eceb56365aab20c71f42b372070b1e946efa9d4f2f8feea9187dbc0924d54
font_02_sfnt_off000125c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C5 11144 bytes
SHA-256: 223e7f6c132cfd49a8dc44ce793a9c33a105059e8925dfd50dff1218bda53103

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