Malicious PDF — malware analysis report

Static analysis result for SHA-256 908227cd3dc0d145…

MALICIOUS

PDF

95.0 KB Created: 2021-07-03 11:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab25051c43a09e63c5eaa026c3e9223b SHA-1: b46e515083544bed1620a67629238acc27195c7b SHA-256: 908227cd3dc0d145b314acee5b8d7c9568289a9d65db263dc8f38a8ad16937ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous URLs, some hosted on compromised CMS uploads, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://harasim.cz/uploaded/files/zogarukigubudilewojamo.pdf In PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8b2253b5812f15a5264b97d49fd53bf5/90282212038.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d85c30881---33760304610.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/71c25f3f59f38c088861c20cc388f536/daduzipasugepajeliligof.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/pkdavgqppd39vql1pt837ei576/40097491196.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160711e598da23---95520348264.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/94323673685.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/bevususefuto.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f44eae8732---67166349203.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160884ad552b6f---19925390241.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb4f5baa02---sixuniberigofamarus.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/440bf60d1271a6fdf1b398439b0f1142/3631542097.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/pc0fnd06doe8jcsspk97l90b3f/bojarusamukeferagifev.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5e2ed288---rotul.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca44528ad99---64218463731.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/8908263416.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/vulanupexilire.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/kasit.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/fabeganetonuwufil.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/zisimamalumi.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/naxesobixe.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a92667b21da---rusugifukunina.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/pasosiminebod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=lonely+planet+rome+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 19036 bytes
SHA-256: 38ae1a5ea31fd13571a4dcdae8f1beb7e6a4c2b8f311a2ef099da5f1692b342d
font_01_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14905 10556 bytes
SHA-256: 48ca714dea842f4cd321ae0923533ad4340edb0670e695eed10e8b2ebf7ac3ba
font_03_sfnt_off0001611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1611A 3272 bytes
SHA-256: 4103f3696e9bfc15d81e588ce35a0f493e1189473a9a7ead730bbd516b84fc51

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