Malicious PDF — malware analysis report

Static analysis result for SHA-256 079e5f2f330f7452…

MALICIOUS

PDF

71.8 KB Created: 2021-09-02 15:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 724a6ea980d52ece675162e1dce88e53 SHA-1: 7fa9f2cd0f8e994971f7dd7aa4a1106d1607c4c6 SHA-256: 079e5f2f330f7452b1cb76acde4215d18d1f62db1cc5759da2a4159e2e98b928
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3b1f9a5f15bb73ce2321f044378b4318/65376134506.pdf In PDF document text
    • http://playeasypiano.com/resources/fck_images/40084851234.pdfIn PDF document text
    • http://195exim.com/datas/files/fizubujolo.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/90559874443.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a375dc428---53310653469.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6f77477b5aa9bfac4eceb9796cce26f9/lujowoneridewiwowegewu.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ad8b564ac---46824027998.pdfIn PDF document text
    • http://medica-brno.com/files/41068411623.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/fupikejuvefewowolowex.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/79688853520.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/2rhvp98nkn6eqcsf97v6h1iiqb/sexexuwafe.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072351b4eb72---berasoge.pdfIn PDF document text
    • http://scro.ru/pic/file/duzoferafetip.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/16931103963.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9f1969b8---45113842094.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/baf55b90a3bb7c63830bff97a278077e/2229082884.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea1073e165---bulejejodurokenawekus.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6r7j00vc4tigqquanjplpfh9p/88007617788.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/93945645694.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/9374233383.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d06e240ea56---verutisirijovapoliratuk.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210815070303.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/96540205111.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/fedape.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/21287483545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cpim+candidate+list+2019+in+west+bengal+pdfPDF 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_off0000b6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B2 15620 bytes
SHA-256: 285f49d81d32ea736bdb5aea2e8873e74910edad3dbfd3b63fcace4783f77a63
font_01_sfnt_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 11464 bytes
SHA-256: a9091e7a91336c24dd29443ea1fe5f6e65f31d396e16b41479929c272edf502a
font_02_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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