Malicious PDF — malware analysis report

Static analysis result for SHA-256 676cf0cc2667c0e6…

MALICIOUS

PDF

84.3 KB Created: 2021-08-26 13:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1a31afa45e6a93e1782fdbe65bb956ee SHA-1: d29e9243f807587bcff22e1c46028d5eb08cd9fb SHA-256: 676cf0cc2667c0e6c373b0da9ffeed9775bbbe9ec8620c2d686bc43ac3dca857
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to redirect users. Heuristics indicate it's a link farm on disposable hosting and points to compromised CMS uploads. ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.sec-ollivier-associes.fr/www/upload/file/vunekagukurirasumij.pdf In PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/latif.pdfIn PDF document text
    • https://codecs.roimages/file/supigum.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c924b3c5581---31781516774.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/8312f74c6c9fe772ebad13a978e6b9d9/33384791996.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b558196651c---wisuvuvebete.pdfIn PDF document text
    • https://network-italia.it/file/wutizikirotudumatif.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/nutoxasudopoveleped.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/8920731092.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853378122d3---92454204410.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/32604496994.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/can6mpd1trd10n417djkbc2q0s/47357829069.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160763bd44fa1b---28804152147.pdfIn PDF document text
    • http://leton.pl/userfiles/file/94104502619.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/btt8se0ljmt1vlgr7bmj3spl1g/34638594975.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a05dde4a544ceb151899dbf1b7a602ac/befapoxonemelar.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/gixuwoledijovewirasutajo.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/gixutefasugavaxux.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rij2t672p2ts1p94ddo1hjh1d6/rakumozatelefitotidopu.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/4855904830.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/sojitujitexatodaro.pdfIn PDF document text
    • https://jagominum.com/contents/files/82393828911.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/rgtfohuvrqjpsdda0u5o5nbv8i/niberujekakur.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ad27e2a316e0688d38b56a834187670b/vapamepaxaxagat.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2qoi0v134hsidb9ekttnitiks4/fuxadapixipimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bethabara+in+the+bible+mapPDF 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_off0000e045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE045 10424 bytes
SHA-256: 2b7d159c561ae00970a378f43ba37aee1c3f9e5055cf9108e1fddf40882a9532
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 19760 bytes
SHA-256: 96202cc05f280407aefe63578e4da50fd977238bb316eb5469380dab9b6e4d75
font_02_sfnt_off0001298a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1