Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6703a30beeb558b…

MALICIOUS

PDF

94.0 KB Created: 2021-07-19 01:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 12ce625d0f8ed5f38589438f456fda19 SHA-1: f6f5f987321f40b42ed1b80f6f0e944057825f34 SHA-256: e6703a30beeb558ba8e8e8c4eb30589db5d5007525e936d89f309890b2554724
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/bbaadf146e9fac53f9480e64b344f1d7/46611844343.pdf In PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec993453624---12386183512.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/15693432192.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b1b50e70e---foxebowudetutodofo.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/fajezagavokaz.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/fenujebebojevaxit.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/37604611402.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/74550111019.pdfIn PDF document text
    • http://bettekingproductions.com/clients/874300/File/44588021855.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/69307854865.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777b23f1312---23248074516.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/09d093778e346e828c25249eb60c50b2/lokuzamavivafunapikeba.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe86360f6e---2560678564.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e70f1ededfcb23e3f1c7a6b96a3d5636/kapajifulalubatomusi.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/31311538722.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5418b25b5637688372f4a46593321539/nirerinusuva.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160872f41b27cc---92029973345.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3229b23f47---jululelanataperode.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/rurupekedoguxefurorare.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/sexuxidemu.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/wapejaluvadujake.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/55897301134.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834a1d48c3---57801158533.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/d7f4d7c6ab9e9b7398ed704dffb5b93d/kejamavazif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=solid+state+objective+type+questions+with+answersPDF 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_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 18208 bytes
SHA-256: 2670fa13104c588d61183fa787cd4ad4bffe25bc730f6dc4b528cc4bd6e7049e
font_01_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 11468 bytes
SHA-256: c14dfae5d983c6f2446cd1c2c1ef6df5171167e4f392cc3714ada073be988fbf
font_02_sfnt_off00015267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1