Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc0d0f00dab4fe5…

MALICIOUS

PDF

77.2 KB Created: 2021-08-26 02:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd6c96f771cc40ab97e097c3420094ff SHA-1: 5858fac34219eb593ae3acf9838bc5c574dff115 SHA-256: abc0d0f00dab4fe5de96d1c28bb973011fd2d5508c9f267d6f0903f7563df6cf
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as Pdf.Phishing.Trojan. The presence of external URIs and link farms strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://domoticasociale.it/immaginiNewsletter/file/pewedunatijo.pdf In PDF document text
    • http://www.tomasjelinek.com/img/pub/file/94996253842.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a110bb31453---sakimolegak.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3d1dd09b1---xibevekamepitadeparelekub.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/46230135601.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d276093e20---xikafugudegumulire.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/71434022955.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/70434155251.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/7lkungkqa9v87gn5ft4b5i7o19/towofimisukagitidufeje.pdfIn PDF document text
    • http://interiorsexpress.biz/dayafter/uploadimages/newsimages/file/betomom.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074430759cce---lojutamirogusina.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/48274464953.pdfIn PDF document text
    • https://fong-cai.com/upload/files/povebo.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210805_312FA5C26184D807.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/wonopegu.pdfIn PDF document text
    • http://chromoink.com/updates/file/wudusezoxufidovomewet.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f5db5c24---lijiril.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6825b02eae---30896542294.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/17352773498.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/rixoz.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/4558403896.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/av8du1e0h3aveocaa4kora7onv/50548256242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=circle+theorems+worksheet+and+answersPDF 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_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 16724 bytes
SHA-256: 3994a3e52fee064736f38c18c9ab7120caf2ba30f6520be520ce59a88c1a4a70
font_01_sfnt_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 10844 bytes
SHA-256: a009d5a2b34e4d1c30e363b89ba4fa8c80bd009700962d6dd4db1efbf4bac68b

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