Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e0dd6be9755220…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 11:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 93a296c3e7eca784930eacb491543b57 SHA-1: fbca75f2d872411d9fbdea93b631df6cd55628b0 SHA-256: b3e0dd6be975522093a2f07886c04222977eb5b0ba070e53ea9744507f972200
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to lure users into downloading further malicious content. Heuristics indicate a high likelihood of maliciousness, with ClamAV detecting it as a phishing trojan. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://offerseir.com/basefile/offerseircom/files/gedaner.pdf In PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/13372020328.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/10979929176.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9ecc0a22d---tarariz.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/fumubol.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/9991982967.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/bexakufiwetosigobonoz.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/tarilosolenizopoxitoralu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614819445aa08---3426084954.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/90739548729.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/2013323078.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/tulomazupowapotetadod.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8fb6939658646e190dca15b6223fc641/teromub.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144422180254---kinipafokuduzozibobegamav.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/74750194325.pdfIn PDF document text
    • http://sergeybazarov.ru/file/51032357059.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/gekedi.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325386258ac---fegoge.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/venowomavekuduka.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7a1eed493---32574887766.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/99984829388.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/gafaxazalaxaxef.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/9896871755.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/retifalizazigibovabuva.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/17109922124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mgr+magan+movie+download+isaiminiPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 17692 bytes
SHA-256: c0ed11e2fb06581e57c87516290b551445afd86a53ed8adf60d1a83c7399da1f
font_02_sfnt_off000129ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BA 10640 bytes
SHA-256: 1bfa1a7291ab962c4805e09275e32a8d3b15146f7baa5a462f85c4cf92b26adb