Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d48402a7ea7bb7…

MALICIOUS

PDF

114.8 KB Created: 2021-09-20 06:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc5d922ede94d905f0b5ce0591bbc2e8 SHA-1: 09b37bd364c78a8a657927f321347d5e866c9bb0 SHA-256: d7d48402a7ea7bb7e8ae3f4111fa56a1574d2b51023a49f3044705d8fed5401f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised WordPress upload storage. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://catamma.ru/uplcv?utm_term=assassin+creed+identity+offline PDF link annotation
    • http://saothienemb.com/uploads/images/files/kipebabesixonema.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210911220632.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/96890844425.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/cd9a2fbf18645f9b6d6bfcd43a5fe261/gigodofajinumoxawigutugu.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/mejewopatowoxu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2b856566d---4139220154.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/75604233296.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/nagobolidubuziweren.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c94ce03e812873774f5bf27469cbe814/2730135048.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/sodapitaxiworivise.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/78518903014.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/kasavunipuwufoli.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/70512549147.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613513e1238cd---34263614202.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/gulejexuwozasifiduje.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/15586668184.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/36421390514.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/35003121611.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360d3418155---janopa.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109022156169935.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/xelozovoremaxalunelivu.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/wusexifawobumedimanebu.pdfIn PDF document text
    • http://it-hair.com/userfiles/bixamufimapakonig.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/xefuladebodeb.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_off000157a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A3 10564 bytes
SHA-256: 25826db208bd6746b0bf3268f160cf62597040a0adf0813678312d1c6dee1b4a
font_01_sfnt_off00016fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000187fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187FA 20900 bytes
SHA-256: dfd60299c9354d984dc52179f8a5ea2b4c393e94830d578c5a82fe0fac66a14b

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