Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c1eba614ab5440…

MALICIOUS

PDF

83.9 KB Created: 2021-09-11 19:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3508f1795d8682505d764aa9dc2ba5b4 SHA-1: e1a1fc8fad7e98737d2e4c1f3d62e7e68dc32184 SHA-256: 56c1eba614ab54407544beb72f1019d5eb865186ffac394321ee4885b41d9d5b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are hosted on disposable domains or point to IP addresses, indicating a phishing or link farm attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to further malicious content or phishing sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://maintogelonline2.com/contents/files/gadebivaxabuw.pdf In PDF document text
    • http://fazekaskozpont.hu/images/upload/file/nefiro.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/vofurononizelo.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/dewikoxofikidelujajif.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/lisafivaviwifebomo.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/xepunikejiduwovedapijizor.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xaxixibaw.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/76867070741.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bf275b1a3---16692430081.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/14024939970.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/63420046133.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/taginudakisirat.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/85006033760.pdfIn PDF document text
    • http://jawarakreasi.com/file/pafej.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/kividujubozerazider.pdfIn PDF document text
    • http://apart1day.ru/file/tijigebivul.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/togajosidif.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/rifopuju.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/vuduxawevimogozukemu.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/47550994290.pdfIn PDF document text
    • http://tochalco.com/uploads/files/norivunolujelonozosafopo.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/65228100857.pdfPDF link annotation
    • https://kitapkapla.com/upload/ckfinder/files/naxisesenevakofad.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/6354041343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=iphone7%2B+price+in+bangladeshPDF link annotation
    • https://lapdonline.org/file/65011357194.pdfIn PDF document text
    • 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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 19356 bytes
SHA-256: 869c8dc7fa545b8021851819612287307eb2d5058d65ad4fe32171c938c9fe50
font_01_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 10836 bytes
SHA-256: 8e7b04594251bba5f5f8d37d69de1f0f7c409a778e8fea6e6ac0d463b6067d98