Malicious PDF — malware analysis report

Static analysis result for SHA-256 701a11812b3fc354…

MALICIOUS

PDF

74.2 KB Created: 2021-09-02 15:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f26e93fd39d143e5875c3d8212aba82 SHA-1: 32878739dafc5bc1d1ef3db2775fadf48764af85 SHA-256: 701a11812b3fc354f0951962c5a2eb414f43664307ea4a4ddcbdd7c5ca380fee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=microbiota+intestinal+pdf PDF link annotation
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/baxolewagudanerenevupu.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/ravazikir.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/93075465214.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/58858680744.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2798423c7---gonajuvowedunegadiwesu.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/1577636669.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202108161649483926.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf84a8c5128---lawiwez.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zoduvesojinojadewuk.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd474c464eb---tigozulazov.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a517d796367---nugurel.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097d28bf0b3a---92079686839.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/titexugij.pdfIn PDF document text
    • http://besteva.com/upload/files/75360364857.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/6b3b22af28a9a5948d91607419d56108/37387407679.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/utht4sfcc64u5vn05fk28qi056/potexeveje.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/mazavugunin.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160f05ae97d005---makiguvewa.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/kupivipavogogo.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/87725b2584c14137820b7fc65bed2aff/namukadowukuvubobarujifi.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hu353gu4m2vvkofu5mk03b2jj1/pavogimokitomofugujotoj.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/70784893704.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ae54ce850b870c66434cc9412191bbc1/75746960534.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf9b888e4---jiwubuvazen.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989bbf4fe43---62176739847.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_off0000c1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 10744 bytes
SHA-256: ac6d73a32bffb28d01bd48cb6bba75abfd4c601a54adb68a99404464cffaa8d8
font_02_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 15964 bytes
SHA-256: 1eef75201ccc3470734f7c568b5ff16ae19f1265eff8355e19cbb406da8c7534

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