Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07b99abdc6ef715…

MALICIOUS

PDF

93.8 KB Created: 2021-10-09 05:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d8bd54d962f8c2942442da846fd0bf9b SHA-1: 998a2f38da3b0ae2f346f5b4ef2c7037210cc677 SHA-256: d07b99abdc6ef715f658b7c9738e111e5724eecbafe59fa39722ec29ee119357
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://allytemp.ru/uplcv?utm_term=balls+of+fury+full+movie+watch+online+free PDF link annotation
    • http://oris-am.com/editor_up/87834030118.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/revakomorugemefofave.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/zipovolaxozajunidugabeset.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/23524984124.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109160120022534.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/vasukukanixijesax.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/61964136221.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/gezisire.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/pipezetizanila.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/wozipitapa.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/gevifugigoweto.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d5459d450b8d8409543707de3cefadaa/pabovagekajulerofulo.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/23542669303.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/84415414687.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410eaeba102---25349361716.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/xunaguvemogerifex.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/fotokagobiworojesavogugek.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/woxonewuzevipabefunito.pdfIn PDF document text
    • http://lawngo.net/fckfiles/natoxonejeraforonakukefes.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16152c6871e522---larixodeloguj.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/8553504704.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/kozisapedox.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/jakemexewudakegivo.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_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11944 11020 bytes
SHA-256: fbdb7e210db83280025a0bfbc127f46f31e43980ced341e128676dbb300cfcd9
font_02_sfnt_off000132dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DD 20384 bytes
SHA-256: 4f56903097280804e825525110a6fe7151a5b906749786eb7595a709909c25d1