Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc9451452254646…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 22:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3fac6289deb141fbd7da387f318380a SHA-1: 95fae65a2556e5e5997e6027a5755bbdd0772613 SHA-256: 0bc9451452254646754b3ea30d51527855673e1d14df8c54bc48cdf1ce80e2f6
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure and the presence of multiple external URIs indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jarauwerdaenzn.nl/userfiles/file/nobefagana.pdf In PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/17148983656.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/zupis.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140cf6b3b400---fosiwabosenugiv.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/15000906375.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3c33be59b---rorapowapokipusegibagan.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/48230644219.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/16108223399.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/46157635222.pdfIn PDF document text
    • https://sooryasales.com/uploads/file/pidutewu.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/26549478685.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135683cd9623---kitababijojuxanisonoribox.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e6ac7d09f---nasovitawiw.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/3226356654.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/lodidiwulilutisezorawa.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/wefopomam.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/ginimogemuxotaxixixutesot.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/rilajizaxofopo.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/subexenonogaka.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/42121930958.pdfIn PDF document text
    • https://codecs.ro/images/file/86227824160.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee815442fb---61034377480.pdfIn PDF document text
    • https://supremeroi.com/FCKeditor/file/feloboweje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+remove+the+ads+on+phonePDF 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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 10664 bytes
SHA-256: dd701656300a6b05bfd4e162c6bb98cd70895c3bb8a0ea48cbba50089c24b504
font_01_sfnt_off0000fd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11549 18220 bytes
SHA-256: 38ca0a28c541a02b6d72141e25b0c2fd61f7a4113d99bc206a50eaacdc0ba20f

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