Malicious PDF — malware analysis report

Static analysis result for SHA-256 072f595b7443d353…

MALICIOUS

PDF

89.4 KB Created: 2021-09-08 22:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 36eb530903c5eca54e9600ab1e8d62cd SHA-1: eb01cf7136d7db7d29656ca8f9d4013275434e16 SHA-256: 072f595b7443d35328e7cdfff8ec65bb4f4684f36d9b08872ceaf815d5d2caaf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=poco+gaming+phone+price+in+sri+lanka PDF link annotation
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/sogowaxojadipuxajexili.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/11152983943.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/towutudadi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f7eb11342---43194604843.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/51588643978.pdfIn PDF document text
    • https://bselink.com/userfiles/file/4023579352.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/sivosab.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/vopanobarekebakukagajej.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/kofekibawofow.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/73567075335.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/74213181054.pdfIn PDF document text
    • https://renewone.de/files/40508651481.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/xezagugafaketat.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/42014253129.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/27343830422.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134af744c200---nasimabowup.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/85131114900.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/noxuzisamise.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/juvusetif.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/turaruzokiwutovinus.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/tirogegaxefexiritibumi.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/84800436624.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe1ce3d9b0---90528013031.pdfIn PDF document text
    • http://floramarble.com/uploads/girejunasesunadidekufaj.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_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 20512 bytes
SHA-256: 618a5220e802d4dc3e3380f6a5d2d1b048a8dd040f700383b9419aacaf752eb4
font_01_sfnt_off0001272e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F45 10816 bytes
SHA-256: ed92d88d451294cd3a062c3bf2579c1e3540b7858d0d0f1e64ac6a0de9549696

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