Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7042518f337d89e…

MALICIOUS

PDF

74.9 KB Created: 2021-09-08 10:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3b9b72cae3fc2a97255619d9c7dc227 SHA-1: a7490436383efc668ab05d1d354fabc787d40d28 SHA-256: e7042518f337d89eb7c771a7790cfb6809201f78e92709cc3967cf50b7a8ce02
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a callback phishing lure, prompting the user to contact a phone number under the guise of a billing or security issue. It contains numerous links to compromised WordPress upload storage, suggesting it is part of a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acd2944f2c---71984341791.pdf In PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b73fd016daa---45316556350.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ade7eb44ea0851db683fba652d10502c/24767352921.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/jopevoviroxolo.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/nitinomulajakezipoxis.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/gisajawulatozotefegavunir.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/fofewivitokujid.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ff7941a2ae3---jubirogedadifabowo.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/wubesudabadufaniforapebu.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/40998545313.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd319ce6e0---tusupuxaxogarapore.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/kiwulotosefufole.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3d4fjjpus1t93m24pocoi4dtn4/wigekajatatu.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090b0953a494---tuzimugi.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/24531427774.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e53bd2bed---46884579007.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/68322647611.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098983e49c40---donaxug.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/m1fcjhnhophrpg5vrih694mpq2/gonufufomudinimixure.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/4badhrffbm3rhud6jis5ug6a5n/bonuzitatojezad.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/dosasapaxazuteginetan.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609695e4d634a---kiwuwaligivajek.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b9d1929ed63e90bc8bf5fdd99985b8cf/19205110880.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/4878351774.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/rorufogabosaxi.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/vovoponus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tomato+plants+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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 17428 bytes
SHA-256: c6881ad7205cc1ef4470cf6eaccaeb59aa391311808ec3f49eb554b03ebe86e0
font_01_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10749 10296 bytes
SHA-256: a8f9740a105946e1bfd27cbe3c41b0294a80f253a2001b218c4ec574eef7bcb7

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