Malicious PDF — malware analysis report

Static analysis result for SHA-256 c019e874bd47d171…

MALICIOUS

PDF

94.1 KB Created: 2021-06-27 23:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24dbd9e10ef29aa15c1bc24948e02be0 SHA-1: 2bc2680f75b46f8776a1d0f1dc66fd2c3caee0a9 SHA-256: c019e874bd47d171b9142efb97979df49651d15817ce9ec34a8bf8ab2a3354f2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. These links are likely designed to host phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc592e98685---jejinilugepivobenuju.pdf
    • https://lecachet.fr/docs/files/51673516637.pdf
    • http://tlumacz-lipno.pl/pdrzewiecki/files/fobed.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07737ea5b7---jozasowesol.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/65208885788.pdf
    • http://4998horo.gmmwireless.com/contents/files/18823036934.pdf
    • https://infoenergie-loire.org/userfiles/file/mesidabemaxavumuw.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aba91eec40c---16807377741.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/8a8b7be7c885e4046db35053906d23b7/86703610036.pdf
    • http://esipro.fr/userfiles/file/71293191939.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/12a9d47b886f9ba582f82701a333ec9e/muwejipitiziza.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/4da039f5b23bf5c05c61b7e3f0cb4e77/88528201649.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccfc1e52f---zijegivawinalevijajetoxu.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f7cc0fec---dutapekuvokakapi.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/67081696858.pdf
    • http://year-c.com/upload_fck/file/2021-6-10/20210610030745448030.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b17e16d2a34---timuxalitufalenipuwafefik.pdf
    • http://gayaarchi.com/userfiles/file/20210521133519.pdf
    • http://micronforgacsolo.hu/UserFiles/file/kezexonikepubapukurefeg.pdf
    • http://retailcop.ca/files/fagapenununasiju.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/01616a4de0c4563517e64a6aef158cce/xepasujomoduladaja.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf18dbcda---wifelevubuvugugifezasu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=what+does+ringing+in+your+right+ear+mean
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ed3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 16792 bytes
font_01_sfnt_off000126e5.bin
1b23604f9a268a2a56ddd644c00bac9befa81534cb2b5bebe26bef7858eceb21
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E5 16716 bytes
font_02_sfnt_off0001524c.bin
5fc4acbe140ced044f6630671c7f1c91ab22128ad808fb470f53f5725fa4bdff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1524C 10856 bytes