Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fa2dfb3b2ba008…

MALICIOUS

PDF

82.6 KB Created: 2021-09-20 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f413cbe87b657c6088d97af69fc9b288 SHA-1: b4671a28a2cc3846862fc11493207d22cfaf9e64 SHA-256: e9fa2dfb3b2ba0084ef51b8e5af0de519344bdcdd8645f4446f78706131433b1
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with heuristics indicating it functions as a link farm hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ariogalospspc.lt/userfiles/file/26334876557.pdf In PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/62950782854.pdfIn PDF document text
    • http://floramarble.com/uploads/18235417394.pdfIn PDF document text
    • https://bor-diing.com/upload/files/4667747310.pdfIn PDF document text
    • http://berbun.com/user_img/file/zegebikokogob.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/41984799256.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/66809097286.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/47284556162.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/gutizuweviwasovedewafa.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/34613312389.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/zojowupavufejopowoni.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-2/20210902155542613942.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16147e53208d99---lofevi.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kosagifuzatitadeludizax.pdfIn PDF document text
    • http://cochemical.com/upload/files/21815798470.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613866f9b6eb6---37247194820.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0c8cddab6---kenejewabovutadik.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/tajapasegakogebunedeb.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c111aaf95---ruvevavelifokufenasebo.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/zibufele.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/gagukegatanulabexisixamo.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/78234015075.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139819f8181c---33371687162.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/2087062136.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210906082153119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=p+video+chat+app+hack+apkPDF 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_off0000d934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 10352 bytes
SHA-256: dc15939d3a5f19ee81c6f9a1c7cc63e78a8e765bb15206d2497062a75ae5efb3
font_01_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D2 19780 bytes
SHA-256: 38be2531a2756da8fda95ab3f687bda4718f1d9d77aafd4a6ec4d0278bc54daf