Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b80e574554c587c…

MALICIOUS

PDF

86.0 KB Created: 2021-07-03 06:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 74df35b3c0d1ccbb69402eac484c88b6 SHA-1: 06d0a41a6c5ac47be73d277747217970c7b11a79 SHA-256: 0b80e574554c587cb77510b4f8d225b18be3e6e84ddbb479d08027c2fa8362d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://queure.ru/uplcv?utm_term=how+to+find+the+range+of+a+radical+function PDF link annotation
    • http://brilspa.ro/userfiles/file///xifiwamuxopaban.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/60387135985.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/41006440264.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bc1e65342---refitotoletarufot.pdfIn PDF document text
    • https://combrooncom.com/contents//files/17740406239.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/boritorafufasejuxofom.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/8c51b5c94520f86202ce5c645229ea11/4524785831.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f24537cc34af5208d573dfb50638fe24/34771124330.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qqbe4e66lkiunij33qtu9bsvnp/fojome.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/murexoworonorufonup.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c82b87bf8ec45eca6c0dcfbcc7a7682e/87901089422.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb60bd32b5---govez.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a43d60eb15e---sewekedipodirabafixul.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/30510536386.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/89553874477.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c65d6cbf078---gonegobul.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/82313874066.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/telan.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/zapij.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b753756e3---25037396123.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/gosudule.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e1d56b60772a5121d6bf551787184f25/dijekataresuwezifagona.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/22887358359.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/juxuto.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091af72b5a4a---92209755893.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1decdba0---92529534123.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_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 10764 bytes
SHA-256: d1a5c6578038248716595ef623a51082713714ba1ee6988091c17ccbce238176
font_01_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 17980 bytes
SHA-256: 0b77099391035ddcaf20e7716dd7e8d3f929b43d59b29b3ad6592ddc1b49ec84
font_02_sfnt_off0001305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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