Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bb36122c5fb2f1…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 03:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: abef14c7ae544dd0d4b22550f5652e76 SHA-1: 88ebb3ff99979fe7c8ec07809d24e638fc7a25c3 SHA-256: 44bb36122c5fb2f132e0722813cfdaca68639a5fe7b504d34a3aae47f487f5dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various URLs, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://uptindia.com/newsimages/file///jibitapokivope.pdf In PDF document text
    • https://himarco.ir/basefile/himarcoir/files/rugojakupoka.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/30754034696.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/60944928104.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210917232945.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gunabo.pdfIn PDF document text
    • https://penzion-palice.cz/content/57545024154.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ft2u204u2sqclska95uj98h1em/selexidafoniwepowajiwizo.pdfIn PDF document text
    • https://laps.pl/userfiles/file/karulobegik.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/64616414038.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/mesalakiratobinolorojozi.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/gaxabezutomar.pdfIn PDF document text
    • https://toocapen.com/files/72719646698.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa6bf09ffe---badogedubumademigulunix.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/30348297479.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/50237092506.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141124197f63---wokatome.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/55108203834.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/lilafajodevamuf.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/nevugok.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/kanobaborezowivasasefu.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ab50435f71eac60753da272d79d91c7d/49074498167.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/kigomunerakem.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/38109387501.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/vosuwezob.pdfIn PDF document text
    • http://slsnn.ru/content/files/81812329959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=guardians+of+the+galaxy+2+123moviesPDF 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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 19072 bytes
SHA-256: 39da8942cd6c52bd91c7ce70d259f6b687e5365651e4be00b4b8e6c376b3fdaa
font_02_sfnt_off00012103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12103 11568 bytes
SHA-256: be116bf190aeca7724d47924a34e1499710a390bb8eac112aad4fe39744f884d

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