Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60eb70babdde67f…

MALICIOUS

PDF

73.2 KB Created: 2021-10-11 15:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3fa2aa99094cd102b6d8487fd68fa173 SHA-1: d646dbb9e758b64a40e3706f299aff3e48b1ee66 SHA-256: a60eb70babdde67ffcf95e0bd80f8b2594376332b981bc40b2db8caa59c960f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's purpose is to act as a link farm, likely to distribute malicious content or phish for credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pre-www.bridge-college.com/uploaded/ckeditor/files/32044309448.pdf In PDF document text
    • https://negaratoto.com/contents/files/92429826355.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161557bf859585---43416507655.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/zokeruwomuvagazozepoj.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/11640958274.pdfIn PDF document text
    • https://pratham.one/file/7676074131.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/zeraxubozazupi.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/jemavape.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/14903348332.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/fonewaxorufivesako.pdfIn PDF document text
    • http://www.pilartangguh.com/file/36132568595.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/sixatojoxapawuwekosojelo.pdfIn PDF document text
    • http://dip.natura2000.pl/imgturysta/files/jexake.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/wigazavopagupotutali.pdfIn PDF document text
    • http://ndfeef.com/radiant/mechimobiles/userfiles/files/dimapoxiwane.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/51870267145.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/93696932970.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/40551709185.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/29222762902.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/5f5b9a932ae1280ff5740a9910586f99/99469156084.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/51027089118.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/65229117396.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/14002492361.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ba804a893---mixigifaxof.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/ff19adb4821a02a54e23e288c6308c11/pazegutimalifeweroniju.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/34572366918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/Z3ufxtS7Wvw/uplcv?utm_term=chicago+manual+of+style+state+abbreviationsPDF 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_off0000bb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2B 16296 bytes
SHA-256: 148a62e87e588f6b117887e8c8baefb3fc6b648a8cbce2d71b5427dff119c9cc
font_01_sfnt_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 11232 bytes
SHA-256: 393bf3116452c85a6799cbca5a9c0d520419677babe3b3daa4c5919d6a691f0a
font_02_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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