Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5048c4c78b1b29…

MALICIOUS

PDF

82.2 KB Created: 2021-08-11 21:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ed83f157feb230f8611fbc75b668b4f1 SHA-1: 1638df68181b1d9f4d2fd43ebdf89474f37e5a9e SHA-256: 3e5048c4c78b1b29c9ff37a7a30bc701267264d864734e8bf13f84a0691cf87e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable domains, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated and does not provide direct content, but the heuristic firings strongly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://divorcefinance.nl/uploads//file/mabepuselikadagadosisusi.pdf In PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/13ea05995a13f5af31becc4d3425f29d/74556826022.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/17473757116.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/60664057671.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/f3f6o28oess9h7sikoss1li9l5/96495777519.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4bb9333a---94932100799.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/bavenakesimesupoviz.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/684ba5ec5b57881a96a8a3c853c97668/mekawo.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/lunetidutoti.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/ladokin.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/84gccck7g1muktseh746fgmhc5/62326848241.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dgl8pcqf5sh8vus05hobumrl2/binudozet.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b38693917c4---gikesew.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e60992de1ad8e8277a36a15ffad2b337/jatupasezujakakifon.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/modevotobeduxelabadut.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c12565f2c78---tobovesosopudarujanak.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/567ae55d183800a7c2425799903f9b3a/dijunusijilogor.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/8c9bf93d47e233c52f77594ad3676737/musubazibogumajosefi.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/31835054533.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/naturusuxe.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/23592572036.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73fc89b324---valejetob.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/buzivivemolurit.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/53695466610.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/bajewuluduzi.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/suzijofojuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=claisen+schmidt+condensation+definitionPDF 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_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 17660 bytes
SHA-256: 8dd2d5b045b2065cddd4a9c1b82ff2b43f7468d93e78e24b83b1491bd30c4bb3
font_01_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 10672 bytes
SHA-256: 4b0bffbb8657cf37f16dfde17b58bffc2a06ab34bbedb468de300dd9f3740564
font_02_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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