Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d4f977d7efb11c…

MALICIOUS

PDF

104.2 KB Created: 2021-07-25 15:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: bf2c92c610864dd7de15984d0a67673e SHA-1: 0f93c88d45f352cad5403b1eacea58ed77c0f609 SHA-256: 58d4f977d7efb11c38f40433283d1d817949b44c44aaa1e6aa62ea1b4939fc59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of numerous external links and the overall detection profile strongly suggest the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://soepcentrale-dekeyser.be/userfiles/file/kikodabobibi.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4jihpaa3k23m00pkq7ivif6sg5/58989075530.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89229a6fa---mobapibafoteteb.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6154a20a43---63442462981.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/86450995346.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae96abe0b5---pagijemamifugevararazagim.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///99094749308.pdfIn PDF document text
    • http://moffatcountyhighschool65.com/clients/878592/File/rotafixego.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/232aff6790303a47cdd8de77e84d1c2e/nenagofomitudajozade.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/fosotogixodekirubadi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0963131a03---sawagotukakax.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/35717035018.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/33584899602.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/48811084952.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/83102462126.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/4e61a90cfccc1a239487f8551c27fc1a/3804373703.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/40480412593.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/zuguxofawaxepilujuxosu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce9cc6343b---jaburadaxatinudafadur.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608268d9ea8bd---bunigalepuriwuwumo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862780cf577---43619521556.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/51883762624.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/fifozanotubumotoxevarozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=air+waybill+template+pdfPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000133b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B2 10588 bytes
SHA-256: f97588bf5b58138cc1c6d7c5c9048f57c19db41586f9bbc40226887a4d48e5cd
font_02_sfnt_off00014bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB8 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off00016130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16130 18376 bytes
SHA-256: a686e939d4c8219edbb67ab0d5abb4747eceb871d151d20a873cfbd7f370bfda

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