Malicious PDF — malware analysis report

Static analysis result for SHA-256 f226dd0d458ac845…

MALICIOUS

PDF

84.4 KB Created: 2021-09-06 12:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b03233eadf81d853276385042ad990e7 SHA-1: 651edbb48c350368444a7d844b2a458818f32c02 SHA-256: f226dd0d458ac845d728dafeb86599a857ce9922ac8e779a25c2a44e6d7627f1
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.florentmaussion.net/userfiles/File/34114051487.pdf In PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/f7e2b855b3b83195ed7a172bbf68f8f4/winunisilejonosar.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7iikkatbjlmgh8jn6s5u36md03/zovimebuzamoronu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20c021af7f---95547783186.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/lupadizomujetezijoxibodox.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/13172eea85e233b6d30ecc5aa8d2ee36/nokosijo.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/a465301b856fb344265f3384f8193bca/nevujivuwowobatimi.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/63666042836.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/76194073493.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/b8acbef2bfe294d2b50a6a2068229446/23336636358.pdfIn PDF document text
    • https://mnlex.it/file/wowisunuv.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/er1l21gvvi7jh3t2she9rr2hd4/wazusutebesonevefavazo.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/pivusilusige.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/6852titfkb0peqaourl8uovhn7/welovil.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/d4c0360e85a342203c3c57dc13db9832/7058804016.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607751e31f38a---72265890060.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/texametigasuz.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dktl2njl5vd3neq677r3u3h7ve/42396134173.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/j3lgkbq68h9rv9dplffaaj4ekn/wusigutakarami.pdfIn PDF document text
    • http://hagithanh.hagigroup.work/data/media/files/pujipevikovivadomali.pdfIn PDF document text
    • http://z500.si/files/ganulofekomiwa.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/wevoxuxoko.pdfIn PDF document text
    • http://jfe.hk/userfiles/wisepemefeza.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210713035945091.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a53dd02c9ec---9884550231.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/49126038901.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30ba6ef303---30063418580.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e9383ea4---95475718100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+manual+bicycle+pumpPDF 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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 17072 bytes
SHA-256: e101c5414b68daab663955b979e0afe4a4f6489f406187b8c775679e47e17f64
font_01_sfnt_off000113b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCF 10724 bytes
SHA-256: 42e4979bf1efbd528fdb324f8fab90c79453c9d7ed54228380a14d5eeaba4304

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