Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ab6bf2e9a62999…

MALICIOUS

PDF

90.0 KB Created: 2021-07-07 02:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97de8ae9fdbb00fb5047e03ff9c6c692 SHA-1: 20a43c9b559640ee976af64bb857f5c675c0479e SHA-256: 00ab6bf2e9a629997ef3e00d5bfece5a4f030fd498ef80a103ba0397a5053410
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URLs suggest a lure to download additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://birons.net/wp-content/plugins/super-forms/uploads/php/files/72960c5da5de92a8a7596baa023059a8/xuxixutozabux.pdf
    • http://misterholidaysanprisco.it/userfiles/files/zitamadigodapatik.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a05802664ac---pavajaforaj.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607450ef4fc93---28766229362.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eda6d84079---32524665918.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7158cf040---tavajopunoduvixoneval.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb52aed3a0c---93138398007.pdf
    • http://coffee33.ru/archive/file/64550020745.pdf
    • http://ebiocell.com/uploadfile/file///2021062300170511.pdf
    • https://banghenails.com/upload/file/pofivaj.pdf
    • http://dailycan.com/userfiles/files/13534796049.pdf
    • https://summit-christian-academy.net/scauserfiles/files/lajubogejopuserezojobad.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/13c1329bb14c65e9715064585b161136/xixubegebegodej.pdf
    • http://beijingxinzhi.com/userfiles/file/20210515100345_868053187.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/52f0d225fcb93e1a30132457275b55b1/66394191152.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/rvdm3a1eq89cu14610uordjgc2/nesuwojulokegilide.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c037348bae6---nuzuzakolun.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eacc58bf1c---34682465024.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b07501285a6---lumogaxiwoboreketojekilaf.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/7462ebd512a8d8bfad23b8e806fd1626/6526823156.pdf
    • http://stlnsk.ru/uploads/file/12381435903.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/xuginofabiru.pdf
    • http://brenno-tojestto.pl/userfiles/file/fiselevanopafatikaze.pdf
    • https://tsegypt.com/file/joxakepesuwupexidufarepe.pdf
    • http://paroissedementon.fr/upload/files/raguf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cable+ratings+pdf
    • 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_off0000fd00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 16792 bytes
font_01_sfnt_off00011512.bin
4e2905ab6ff4aac414db883a471f01247ba8ec2103eb127a0e793a15fbe6d236
pdf-font-stream PDF embedded font (sfnt) at offset 0x11512 17356 bytes
font_02_sfnt_off000142af.bin
41ec2e94ec6275a112743a901a0333cb82cadf34b68095862cf0d18d9f4583ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x142AF 10724 bytes