Malicious PDF — malware analysis report

Static analysis result for SHA-256 014b92a1b2929c63…

MALICIOUS

PDF

90.8 KB Created: 2021-09-01 05:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d75d6b6730c0c152c4c6df7d7c53f00 SHA-1: 93b120884de7b2c38290a9dac5c4438db75bb61f SHA-256: 014b92a1b2929c633848eb3330ff2c89c5591990fc0cc3b49f6aa59e03b9959f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which appear to be part of link farms hosted on disposable or compromised domains. The presence of these links suggests the PDF is intended to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 https://crysiq.ru/uplcv?utm_term=welcome+home+bandstand PDF link annotation
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f7fc442db69---89291056214.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e76d4902736---sinozota.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/27135490245.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/ligewumobisifas.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9528b0962c---noxinureva.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48b61ae90---nuzum.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2264ee2334---93103758411.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/nepefidekefavatume.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/52205071351.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/36e624a63b0187cdef57dc81a5954dbe/91413523123.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/49655529151.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/735984886eaf1678393355ef40d153d7/61213897251.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/71497724492.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/vojorob.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/18551954366.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/919netavm75e3npdghai6vcbu5/lavotug.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/11359470731.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/zagujujirodajexuraxajotik.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/fd40beab51ad858196f4b24847db7694/suwukavopofem.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/rewatujusebavumofamazesi.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/6e0479763cbeb3804c7dd9a9577e53c0.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/41987779217.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/89303494551.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3d3a93a58---21345378277.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/8944299281.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/a9b9b1c427eee16a30789dc4b516ac3d/didijixoraxuzosumizigo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb0c77d85a---71926434942.pdfIn PDF document text
    • 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_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 18032 bytes
SHA-256: 80393b0098c297cb1d95b44e76bebaa72aded53af19081fbaf153b1a8edf1fa5
font_01_sfnt_off00012d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001455e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455E 10576 bytes
SHA-256: 345df093118da303be3d4e4195b67d74c142b515bf289319a7ba726eabac2f19

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