Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2107ad76e2faa8…

MALICIOUS

PDF

87.2 KB Created: 2021-08-06 14:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 1a81a953793ea42f8864d62f6114838d SHA-1: 80f9a78de1550ae7f5064fa720f92b5dd9734cd0 SHA-256: 6f2107ad76e2faa8744bb26cfa88f6ec3905ed963d2b00dee6e2e7371a17056e
164 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=andy+android+emulator+download+for+windows+10+32+bit PDF link annotation
    • http://landonintergroup.com/ckfinder/userfiles/files/21107641048.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/11891bdd4eb217dc6df41824e7e0393f/49314034634.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075964a090c6---tatubanepixuv.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dv74aavae5a4mgv8l2lchk1j63/vodolasitizeduwulil.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/donexekonekariga.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/bsftbd99gvatm99lolhpo0mtb0/wuxosawominadomewiz.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160869dd22b4f4---mexifawavefega.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210801213452_b22vjb.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/tejemuje.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/vemanapegodasinesugowoli.pdfIn PDF document text
    • https://zold-kommando.hu/files/tupobirilupilubusuwibumad.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b3e45122---84324719366.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34b2fe1f76---girakaruwuka.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/zawer.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/kisor.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/kelusikomasom.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/bukokuwasakiw.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/renuguxadubatozolozipibu.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2nrivio1v3vb5biapj4kbqkcir/kosetuxiwetis.pdfIn PDF document text
    • http://jucal.es/images/file/15505685574.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/51080642383.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/gedifusamafoj.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5k2r9dir9h10u768b9aj2ng9e9/12134456331.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/44992732.pdfIn PDF document text
    • 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_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 16684 bytes
SHA-256: 39190c16651224baeee32760882bed7b283e75f4c5a44a84ad8db7433ef8e16c
font_01_sfnt_off00011b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5C 11400 bytes
SHA-256: f569e29eb1fec09ab963d335dd670fa512e8a2afa5e9af1362dbc6d904e89e19
font_02_sfnt_off00013679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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