Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4cfce6f404e6d6…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 10:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52fec50bdc8737798227bf6b57ec4004 SHA-1: af796a32002d3083fab616aa10317e87fb3ffa07 SHA-256: 7c4cfce6f404e6d66c7ce11cb5d665f5b81c9a0b1a9f4feee01d8b1e4992c7f2
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates an attempt at phishing or malware distribution.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/73595059415.pdf In PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107de22a8059---valemen.pdfIn PDF document text
    • https://sayurmateng.com/contents//files/wojexipaje.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210702015202_743433.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/80461212766.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608585bfb8bbd---bomoxefox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088821f41f1f---10185030457.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/morekopomemepedobifeb.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/xosese.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/bilizuvezutogana.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/78614519522.pdfIn PDF document text
    • http://metapolar.hu/tmp/bewujokip.pdfIn PDF document text
    • http://fairmonteast1978.com/clients/71195/File/tizazumivekokezopux.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/habi4irmboru4hke25cvb7qcoi/teponudonupuw.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd50c18d0d---zobiduxojuzurun.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/11908165345.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/a3cc91b29dbb1564e4141d24e4f25b41/30329048676.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/93602410892.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f27416e79---ranorewonaguxin.pdfPDF link annotation
    • http://totoquynhhuong.com/upload/files/97703564312.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/nazubu.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/givitef.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ca8b6d189d9fc5c5827191599913b93b/selufezuludirakebe.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/luzopezez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=fleck+5600sxt+operation+manualPDF 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_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 11228 bytes
SHA-256: bf99c3e601604b418c3b7f90f95def11788ad944ca092d7ec8cfe65e73d76939
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 16904 bytes
SHA-256: c1e64180b5b3988fde52af21b62d41531c0871e347f60bb19b69d96ce7688f72
font_02_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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