Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcce5416e377a288…

MALICIOUS

PDF

79.0 KB Created: 2021-09-04 08:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c3789079587c335c122062020184ec5 SHA-1: 293a74cbff5bbb6661e7cce1350c86ae50e3561d SHA-256: bcce5416e377a2880c82b94461ceecfe319261192cbcc08db4d5283d9c8763b8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084965f60ca7---81327067006.pdf In PDF document text
    • https://casabresciani.it/uploads/file/45907940346.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/43614260533.pdfIn PDF document text
    • http://falerisztika.hu/tmp/10163215499.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/pugojazevo.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/20544308268.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/qho8415k5mcl67lqq1ft510kk4/poxibuligepon.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0afcb75f10fccd6019328af9c4367210/95223091647.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/lipixizakagikexe.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/qskqi0e9mhpvah2m14nis4as3q/kolemen.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nigimipegigajajolo.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc31a667e8---97276938973.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1335410f43---tibasarogasek.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/21556103940.pdfIn PDF document text
    • https://lavineriablend.it/file/53609822476.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/36805401381.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ksuld5bphbos90859np08okl65/kasurumeboz.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210819105804.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/42384657020.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/48743195819.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093db6782428---defaxumixam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=normal+distribution+table+right+tail+pdfPDF 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_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 17108 bytes
SHA-256: b05e2a0934fafbc0587a6feba60c0345282105bb8156018254f7c5df71812628
font_02_sfnt_off00011524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11524 11164 bytes
SHA-256: 2acf1021d38c3c00ae11a4facf0707af94204d692f543f8409424a4dafb0f649

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