Malicious PDF — malware analysis report

Static analysis result for SHA-256 a220d068f8b487a7…

MALICIOUS

PDF

89.7 KB Created: 2021-07-31 11:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2c8d7f1d93d3c753a7b179ed72543505 SHA-1: d64b110c557fa5e0b052a4e5177ef211aadc771f SHA-256: a220d068f8b487a77f9c04aa9df20dc605ed3aad5901108f5e7d0f6777c093cb
196 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it contains a link farm and is associated with social engineering attacks (ClickFix), instructing users to run commands. While no scripts were directly extracted, the nature of the attack suggests it likely attempts to download and execute a secondary payload, possibly via embedded JavaScript or by tricking the user into running a downloaded file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://wajl.net/img/file/202172612110.pdf In PDF document text
    • https://alutat.com/data/file/3132872583.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/50923633312.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-28/20210428234618829175.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/6689738cc472477751942faca4b03ac9/zigomunifutipakak.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c840c69968---17229241046.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ebb80e66a82ab87797dc3d689dcae419/31917213831.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/44024199589.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/kolimekixuvidulubef.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/5db980448d81f869e332440c0eba3ecc/61982383459.pdfIn PDF document text
    • http://cga82.com/admin/File/datefilokunafizowagogu.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/mrociflt2agiqi9hrklinbj3ad/43360339247.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/c87b27abd2fcd8e15382bd8b2efc88ee/92357362975.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/rifuxebevenisox.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ccb0fc8ef48e435eab45fee96a73533b/finixagakibuwavolub.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/pq9nn0l4fn8ftefjskva8lqifi/48570808096.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/nolelazakopa.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/d08b7b8cf33e7516e1fc27c43cf79c57/40114172377.pdfIn PDF document text
    • https://olterus.net/contents//files/momulesuno.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/moromoxulud.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/gipudovixisese.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a181dde5278---65551165280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=windows+10+1809+language+pack+cab+filePDF 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_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 11556 bytes
SHA-256: 3a172eaeb9d27a6dd62596d50304b924929e42b9a4949657b464dcac06b7e1c0
font_01_sfnt_off000110be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BE 17860 bytes
SHA-256: 4481fb33fcb33f896e44d040ffc0c4f6bbfb695a7788070c666f3d95bc323390
font_02_sfnt_off0001404e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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