Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccf7031f0ec649a…

MALICIOUS

PDF

91.9 KB Created: 2021-09-21 12:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5b2e36b98cc536f130450db1a898ba92 SHA-1: 29532545d81d61e06737fd12bd8bd3d6a31e744d SHA-256: 4ccf7031f0ec649a722382bb387b06498e7cceabf654f17fa6bb7d8ad50c0e12
216 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious intent, including a ML classifier flagging it as malicious and ClamAV detecting it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure to install a browser extension or plugin, a common tactic for credential theft or malware installation. Numerous URLs are present, many pointing to disposable hosting or compromised CMS uploads, likely serving as download locations for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://haiannweb.com/uploads/files/zopajavigeja.pdf In PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/maduranexowuni.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/zopofepazi.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091219014473499.pdfIn PDF document text
    • http://ihdbd.org/upload/files/muvaken.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16140275100a77---50394485841.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/kurelevu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae962f024a---38100835248.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/66291494873.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/ketirezabobopopifaz.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/65751261846.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/zunosafimekiver.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/28m4sujuag2nlic0t2fgjsepf4/jukemupawibozekevodisog.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/rebifofujatixuje.pdfIn PDF document text
    • https://masihpt1.com/contents/files/2472215752.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/96235475933.pdfIn PDF document text
    • https://longhoang.vn/upload/files/70679430442.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210905_B085640C25510157.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132abab43ee7---kojozilibexenewete.pdfIn PDF document text
    • https://questyme.com/userfiles/file/semipivukulupa.pdfIn PDF document text
    • http://jarosi.hu/files/file/23699856404.pdfIn PDF document text
    • http://zerosquareonline.com/file/69291504386.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/6637pkmguom143tk9527lq2r61/lafafizodinetus.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1b99bfec14ee53a4d43de257a52aa004/vixowedukalalavumad.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/xalaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=restore+iphone+from+androidPDF 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_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 19168 bytes
SHA-256: 0138f75bf08ecb73f64cf9fd2c14ddf567787135243c9fc85561d316edfb30e2
font_01_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14989 10764 bytes
SHA-256: 5da89206eac2ec7419156ffdd9bceec2abf1e756178a536d457b685e3ad788bf

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