Malicious PDF — malware analysis report

Static analysis result for SHA-256 072b90cb8cc9644b…

MALICIOUS

PDF

67.8 KB Created: 2021-09-24 22:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: df2e151210af5162f0d5094c84e29a7e SHA-1: 92da0605b996a3cdd2050bf6e8a5bdc2a9e6d7e2 SHA-256: 072b90cb8cc9644be5bd07cd80df9ae5b2b890bd660ce166c46817e2082784e3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking an embedded action trigger. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the overall structure suggest it's part of a phishing campaign or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://jonme.net/ckupload/files/39834261498.pdf In PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/nujagadojupibozolitaz.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/46242418067.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/46178642821.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/17449698030.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/97902085250.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/orovew.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/tujoniwabijisixelutig.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/sapezimuxiguzu.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/danalibixijiro.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/wejavegonedaborivavosuf.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/mavuronedixozipuxotuzizil.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/63596007881.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/84778309621.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/14988548872.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/37806321361.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4bce7f743---14102345375.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/77476447377.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/seruzalove.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/xuxilu.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/wikabebawomojegebu.pdfIn PDF document text
    • https://ziyang100.com/userfiles/file/art_16321888168696.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/49494047043.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/jozarabijesulirajowod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=traffic+tour+mod+apkPDF 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_off0000af66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF66 10484 bytes
SHA-256: 23cebc9ff1bdedf4a3c7bafe4aa00b26b74288d33b3a9de1339d9563e9eb6323
font_01_sfnt_off0000c74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74A 14032 bytes
SHA-256: 54e5712ae9a5b30a8f6270f39b5e956b07fb83e7bd69a2e489b61672fcb35ebf
font_02_sfnt_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1