Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc2f2fee4ea1f8a…

MALICIOUS

PDF

85.8 KB Created: 2021-08-21 21:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 27ea519fba0fb8ab013880a7bd3644ab SHA-1: 8243a41922b4172c5752f9c21265dd2df1f38b49 SHA-256: 4cc2f2fee4ea1f8acf48bc81ef047516f955aa41e69bab78a0d80077ebdfc543
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://soudurelauziere.ca/upload/editor/file/sidobirilobemak.pdf In PDF document text
    • https://synodradomski.pl/userfiles/file/36851121893.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088f35431477---61399872566.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/38383298510.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/48665126212.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/pilikofanusin.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/uiuiaeuakml8h5mk044e4837i1/78956884807.pdfIn PDF document text
    • https://polandpools.com/contents//files/5427063347.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160928e89185f2---99183943624.pdfIn PDF document text
    • http://rintrans.com/files/vukareziwojuxe.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/5890048576.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/xesevesikejizovezufe.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/xuruwogigagipobex.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5d9d3ab6ecbbec342ddfe225e151c7eb/14137616387.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/ruwezizipuzidede.pdfIn PDF document text
    • http://charivne.info/images/file/jeratazuxopirogivup.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/24656662597.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/71485090779.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/b991f06d4611a9cfddf2a7d7b68c9864/filavatovesejorenad.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6900f120bc---zowetukosavi.pdfIn PDF document text
    • http://limoride.net/gallery/file/likoruxaneluzugorutuvotu.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/gorebutujafezopetugev.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6f418c1e87ead38d76121ea88c4507fd/losul.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/nojogudaxebututifegufumuf.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/xodugiloxaletejukixabi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/oo1g89muekfo2gbvqc08nll466/najukuratixoratapevidiveb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=experiencing+architecture+steen+eiler+rasmussen+summaryPDF 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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 16964 bytes
SHA-256: c1221cf926c8590ec1b0f4d1598b072b843ca3ce7e1ddde25323dc72ccadb028
font_01_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E55 11000 bytes
SHA-256: fa441440799259de94e5b8d7525a769408bb57824f1e934825c2c0c929b7b6de

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