Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec86ddae882dc36…

MALICIOUS

PDF

78.0 KB Created: 2021-07-27 22:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f1206fc0f66d9f3bb705e0e3d69f7741 SHA-1: ba45c34c0edfa560016eb716473d07e51f695acc SHA-256: cec86ddae882dc369a1d0482ca2fcc67642daa743ea6a4edf0acf2042769ea18
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment. The file's structure and numerous external URIs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5355

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://srinivasagroup.com/ci/userfiles/files/55671898184.pdf In PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe302c7bb1---18254177123.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0441745542---gimugabug.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/96509490140.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/kijabobawuwimufuwe.pdfIn PDF document text
    • http://gptools.net/userfiles/file/pazupiwudijazaralotutil.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075659dd687b---95713177388.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3059a40359---23166426391.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/fasomuvifejobakanarijopo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc5f38b6e6---21665053920.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/cb7a3bba67c510e1a58cb3fef225eb94/buxuf.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bafc90965e---kogasinitafemazori.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e657927a---98392677248.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a095d4b9141---zupasokafojagimafedifo.pdfIn PDF document text
    • http://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/9402021547.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098854cec371---meledikatorabog.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4255a22eb8c8f5cebe1c3cb964a0e98d/38685243417.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/folidizalemipitibax.pdfIn PDF document text
    • https://unosms.us/userfiles/file/44571806493.pdfIn PDF document text
    • http://valeneighbors.com/userimages/lusixamudekidiwazuranobes.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c9a6cff3c---semovuto.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3644c434bff686d512d03e37e026c956/15350500267.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ed7282404---wenozejowava.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae31d0543---2837673622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+issue+cheque+book+in+sbi+offlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 10728 bytes
SHA-256: 8749999fd8daf047720ae35bffd8a71f01ad5110b42bad290fee79ffac75fac5