Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda097f5df921a28…

MALICIOUS

PDF

84.0 KB Created: 2021-07-14 02:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 44ca3c9041716ed325a1c0f302adbb0a SHA-1: 59a8f70e90537c72c4e34218aa8b58ffc5875f18 SHA-256: bda097f5df921a28aa0243824a984dbaa1834b0b9aa43917710e3ecdc18c6641
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of external URIs and a 'download button' heuristic further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://premium-t.info/files/files/44686789861.pdf In PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e512cd9bdbf99c0bcd24081301b8995a/57674790585.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/17880434864.pdfIn PDF document text
    • https://olterus.info/contents//files/94961534202.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/33614575336.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/nodisidowezevaguru.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/nhq5a1sribml8carvo4eh06b7l/jidipekufuwasavuxipoxivi.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4ad2280f3a4edf7dbba5caa06365ca0e/gabawutofogaron.pdfIn PDF document text
    • http://brukbet.com/user_images/file/luvog.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609867e76b3e6---pijaxu.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65c7fcce5a---29829080526.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e61ee21a---kesenolonixajikerusun.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/39650847417.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/xefuvenokir.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/5e19eeafcbe221f9c0f389f734856dea/49943833477.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/76299751149.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef18a54825---sobajifa.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876e1b7eab9---65440078067.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e79b741309c2341562a817fc47e1af65/wisilop.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/davuwewamanujosuwubifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hecs+repayment+calculator+fortnightlyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 11132 bytes
SHA-256: e6f7ee1f17dec8574b9f1a2411ea2bd49ca303e9aabb62cb33a8a1a1a10cee97
font_02_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 16516 bytes
SHA-256: a9c9f98d6c6e5e915e43e1114072b8115ad34674958ae8c678baa237b35a34d8

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