Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec8147b86b7f95b…

MALICIOUS

PDF

168.9 KB Created: 2021-07-28 08:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 87d7f2ff85ed10701e16b5e8d48a83fa SHA-1: c25eb0b7596fadd5d8da0fd3fa806562304df197 SHA-256: 1ec8147b86b7f95b394e16e69d4e956c5ad08a8e0026860dffa103ac10c28b4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9647

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://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080213096115---wijurope.pdf In PDF document text
    • https://eucolait.eu/userfiles/files/fiwelazunerovolowu.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/wufirobewibavumatolokelem.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7743948ffb---musasu.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/6830072496.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e0f6f8a3---32144728912.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f23dd5d0251b6f609dbee441e595b4e2/79835674902.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/45979249638.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/441a4e326706b3d13e64f083184df530/2334605422.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/bubigotaxopagijagate.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/jimopa.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7ba8237c09f29480931551988e973610/51122812536.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/sadarumijabi.pdfIn PDF document text
    • http://fastgood4cheap.com/clients/4890/File/6267626523.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd66237b4c---wenefaxidu.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/iqjudlhv0jv5e8ie1eo65aobdb/segemeral.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ks6sobu3oitqia193cjsseqnb3/rivunarasubax.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/v8uq91t2vi3btudj3f04jd7tap/tajenizebewewufej.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/95012780071.pdfIn PDF document text
    • http://101balkon.ru/upload/files/68612213144.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/39936238334.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3752ad5ae---64641222286.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c818888878---dadajifevewodule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=hyperion+launcher+26+pro+apk+v51PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F061 3424 bytes
SHA-256: 6e259db8c3bd116c48014b82fd40ab3eb7df0c35d69a358193c085ace3c1d46f
font_01_sfnt_off0001fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDDE 11040 bytes
SHA-256: 5d87125fc2a5618fb32e8efb03dfdfb3e8a4dde381c91c040375f6f5da910dcf
font_02_sfnt_off0002178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2178D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00022f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F9E 19948 bytes
SHA-256: ed55657bbd718fd16bfb25ff803b4f16381305185f9fd4a6ccdb5a0c9910d67a
font_04_sfnt_off0002523c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2523C 27144 bytes
SHA-256: 958eb14deee851cc5ac262bd16d508ea9ffa07c5f03f93a5df78984f8db8086c

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