Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe038e414987b9b…

MALICIOUS

PDF

77.9 KB Created: 2021-08-21 10:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 28e269eb4e8533eca1a9d19c6334dbe7 SHA-1: 4e0b8ddd9a21bfbf039b06a5ae385fd183c097e5 SHA-256: 0fe038e414987b9bae669d29997884a47c40bf2ffbee6925dc9a13abcee1681d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of links pointing to potentially malicious or compromised websites. The presence of numerous links on disposable hosting and compromised CMS uploads, coupled with ClamAV detection as 'Pdf.Phishing.Trojan', strongly indicates an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inwebjor.ru/uplcv?utm_term=oxford+english+dictionary+java+app PDF link annotation
    • https://nhahangphongcanh.com/uploads/files/25608813964.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee51c7d21---zexujitis.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/pinapevenix.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/16394383248.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/sifipavixulixuwinupabeb.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ed878ee7ff3---22948758986.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d82ec0649758e997e18559bebb7fdfdd/serodarezelasunuli.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/lekebole.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/400edebf042ba1049ea4140d60799d80/49518879897.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/83381907929.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/85718182274.pdfIn PDF document text
    • http://plncse.hu/php_data/file/letaduxaratesowufotarif.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/45349527229.pdfIn PDF document text
    • https://motacademy.it/file/30016640815.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/87883391415.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/gewisuzigilelup.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/xogulowaxaripenubalonoj.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/74876469231.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1qs85u4blahlldf8t11tim3jj3/xotejivaxetaxani.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/sutilubepexidadurevawewum.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/4d40532bc4b4e07969150ae7bf40f29a/luzavodadonidajawidivijo.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bfc4cf52be57f9816cfd7af1cac75f93/70436980883.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/novixenatojotokumuxil.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/71876786845.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_off0000c9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 11336 bytes
SHA-256: 4b85021d27415be20ea87723773d89f06d8326aae530ff5c92d30d1342c108f4
font_01_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 17508 bytes
SHA-256: 63b2556ab0cf36eab01b38d53cb98fc68bc4e6d225b5e40bd59621aef2ad64a2

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