Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c388182625dac56…

MALICIOUS

PDF

77.9 KB Created: 2021-09-07 12:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3501acee1b5c6aa0425fec4ab2c979a6 SHA-1: bb4810a5c717e8e4f82e9f2cbb3245f36b3ae787 SHA-256: 1c388182625dac5607841bcb01eb2a7f9c143a7b2554c78a5cb72a42cf5b7c62
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, several of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://files.ibiza-ferien.de/file/navuk.pdf In PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/merelekonilorokaw.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/60670789697.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/bivawetijutetazekuke.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98f026ee79---pokoxovedesijivarolobowa.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/68263096885.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062703500360.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/m1bq6t08vfucghju4ovoijkcs3/96812759570.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118d78ca9a23---27471602551.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/nipuxedazaz.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/22ojvae8levsg08e21sjotn2a2/34573630671.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/dusetukevo.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/wowivobowi.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae22ca95481---8314632458.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a756347a6bc---dukuka.pdfIn PDF document text
    • http://builderall.info/userfiles/file/foxojufizopigi.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/loxuzerozinol.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/79532875389.pdfIn PDF document text
    • http://menlopark.com/wysiwygfiles/file/jujumunajazogabenavu.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/50509913961.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/239c4fd4ebad53e57035acee1d53bb33/sefopigowetof.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/78964924239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=rslogix+5000+emulator+manualPDF 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_off0000c667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC667 10956 bytes
SHA-256: 8c4337ba0bbcc3a63bd97150fb917db8186bf7d80e9f1672a50390c99890c80c
font_01_sfnt_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 18680 bytes
SHA-256: 7b19d334c60a26dc76cc9a1e2a80076277ec1f1cfc51eef0a0cb22e183de98b8
font_02_sfnt_off00011106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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