Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14bca0e9397a019…

MALICIOUS

PDF

73.3 KB Created: 2021-09-06 01:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa244f86a6725f4d268d945ad62aef57 SHA-1: 4c2ff9b5156d7b00f86c29507ec0fc07e46ab550 SHA-256: c14bca0e9397a0195792d763bc6de55041d9ca37e859395a29d1d7752bfc8f7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into visiting these sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=inception+the+shooting+script+pdf+download PDF link annotation
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090a57e82ab6---gulig.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f551471e6b8---pabivogunivazag.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/7963564240.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2842ec60db0c365bc3cab4afd76a7785/83895795122.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210725215019722.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/66926587206.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611122a55cd7f---kevejoronupusurobibiduda.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/mapetegejufemosal.pdfIn PDF document text
    • http://jestbogiem.pl/app/webroot/uploads/file/kisivupul.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/28072107355.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e19fd1128e579d1abbeeeb97ea51ef31/fefomiwejofa.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/94093157617.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/71894880244.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vufuduvemifixexo.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/bobimizituveva.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608631fb48588---94600597811.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/10776047739.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be475ca92---1174924443.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35d014acb---vokagafavobuso.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/v5v7ghqt8lnhcjtaj99tcgm4m5/jademumupowerojo.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5c431a2f110531420c9ae20c89bae72d/dexiz.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/zopesi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/xarotojawedabonaderiv.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_off0000ba7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7C 16764 bytes
SHA-256: 9298e537dc0bf600f9a9d14aafb740ca00c8ea4558fc750c4887cc3b524318f7
font_01_sfnt_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 10936 bytes
SHA-256: 3d36ae36b479e8adc3cec095d0f8b5b19a0db24bc084f2eed2f86e4849259cb4

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