Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2f852e1e9c6a82…

MALICIOUS

PDF

84.8 KB Created: 2021-09-04 00:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc28e3c8633d23a5712d21a316bc6765 SHA-1: d631648ea2111616815576827a4cab9a74a1be88 SHA-256: db2f852e1e9c6a8232f694cf4b0f80e139d397722712f463982ba194e0635307
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://archism.ru/uplcv?utm_term=download+nitro+pdf+full+version PDF link annotation
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77420703661.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611b4dd816b6c---kekuwurikoxukegu.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/e7626ce5f9bafd1b17c13a6b67a04ec5/xigalin.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fe14afd6c858d32cec13cdb7ec6fc395/navazeduvavaj.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/68dc54ddbcc866adb29f8c201b83238f/1697333069.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/53136041810.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e35338bbe---midiviwi.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/jugeniken.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/kowosab.pdfIn PDF document text
    • http://onlinevay.com/upload/files/25998917523.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/82806275528.pdfIn PDF document text
    • http://sy-smile.com/upload/files/fukuvutogugi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803a825c8c1---kozijogamimisoxiju.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad1c3218dd---nivuropor.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/iq9fmms4lbcrf8k64qtamk9ve3/sulivikomumanerinuxo.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021817181303634.pdfIn PDF document text
    • https://arerp.kr/data/file///22948162983.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/42028166660.pdfIn PDF document text
    • http://change4best.ru/upload/file/51836892554.pdfIn PDF document text
    • http://wawa757.com/uploads/files/refopulikafaxuwasutopizit.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/mejajafipifitatevun.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f20b577aa29---40290646133.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/6175928705.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/50886056233.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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 10744 bytes
SHA-256: 9c953cb360e634534ba2dcba9db3311550757c4d29d505dc0fc0ef32b8293a2c
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11408 19512 bytes
SHA-256: 3369cac8e671cf66853196050d83936e3e8c8f41eacf2c31b2d0d29ad48de454

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