Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e32ed6cdf78fa5a…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 21:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 51485065715ce753ec730252a02346fd SHA-1: 6558f2d5d0087b7f21cb1f15bcfae5a9afb2a26f SHA-256: 4e32ed6cdf78fa5a100255ab2cdaa05943a73bb75536a71afa9cc9f1b0fb94fb
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with several URLs pointing to compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms strongly suggests the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://fornacedelia.it/userfiles/files/vilexowivujowubulujimu.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a1f191b8b---linefubogorolifoxezubum.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/57317704103.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/16836057271.pdfIn PDF document text
    • http://tzsunup.com/upload/biboliviraperorodosozivo.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/bubewitizazidixi.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/dagazikukelozopuluj.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/bidezaxagixiwiwitoxefubo.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/xabubukexewivaz.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/93226671154.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/fepab.pdfIn PDF document text
    • https://teater77.nl/userfiles/file/kadal.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/92885701147.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/41704807582.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210906223550_265335384.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/zixuzalade.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/vinuvatilefugumefagop.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/46e42b0f72cae5ea2274dbb70f3996b5/rojizifaxefusozed.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090904525573499.pdfIn PDF document text
    • http://rem-proekt.com/f/file/rowegijusupolijur.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d11a5f21d---gijametenuk.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/85924141834.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210915202838_1109438379.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+make+a+screenshot+on+snapchatPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/72594381321.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_off0000d7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FC 17196 bytes
SHA-256: 9ad60ca0c9eaa80ac0fe985c682a5221262a0fe22aa06e309e0dbc74614055b9
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 10672 bytes
SHA-256: e7e2ec4f40282eaa5fca9a90cfa85c44820ac9a211d37ef2ae07623c51c5f366
font_02_sfnt_off00011c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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