Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64afd038a15a408…

MALICIOUS

PDF

78.4 KB Created: 2021-09-18 13:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 16da7b17ea43bf497973f07435374f51 SHA-1: 0fb528d498414c0a431a2ca17aa3278172ad86fe SHA-256: d64afd038a15a4083ebb6762468c16b934600817ffda2ba75a6bf3df4b07da3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The presence of a 'utm_term' parameter in one of the URLs suggests a targeted campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://top1np.com/ckfinder/userfiles/files/rixepiruriwuza.pdf In PDF document text
    • http://fs-select.com/images/blog/file/zadajesomijovolobu.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/edcc7a9957c0268084fcb57e52522aec/719350920.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/bitikizik.pdfIn PDF document text
    • http://fourfoods.com/images/files/87255021717.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/rojopedofatarojuwikosorak.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/bemedokifajowi.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/87173831471.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/jutamejimomumiz.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210906030736.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ce98e2babdc848551c0936da5765497e/kuweleta.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/fapiwilobabaki.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/luwapularavekawet.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/15816780681.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161339dcd52868---mezuril.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/fupasadivurukar.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/21983494141.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/79722579378.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/takatezuvilakinojewevo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9f10573e5a4769c5cce4d0ac85933ad2/88094176268.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/jufufa.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/sevifuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=code+to+hack+wifi+passwordPDF 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_off0000ccfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFD 10776 bytes
SHA-256: 3114750fb94ac5f325aec6bd85a324bde8e73baa7ebb32acb474ba4c7ef2e8b3
font_01_sfnt_off0000e612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 17860 bytes
SHA-256: 29bb1bf88ff7118f4baf78032ed7a74bdb491f809e2691c65ba4a46bd17bb346