Malicious PDF — malware analysis report

Static analysis result for SHA-256 054abcb043f4f0ea…

MALICIOUS

PDF

81.1 KB Created: 2021-07-05 03:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b02b370d07d434a0c2a8a2a4ae1a331 SHA-1: 33edaa4d600f9dbcecfde76bafe0e59beb290c6c SHA-256: 054abcb043f4f0ea24558caff7f634b39a4b2bbfdfc9f82a4e3a58de3726ff0e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links pointing to potentially compromised or disposable hosting sites suggests a link farm designed to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607972994afd9---57024439333.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a78dedb431acce6561ba0586c5caa90b/8501232783.pdf
    • https://fertilizerproductionprocess.com/d/files/gutoguw.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/7kajn7gnf1a5vlesng4umu2hmq/51906985895.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/13cf17841df9a9de362fe8ed71bcc881/50787058639.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/es9c9o6qk6aiiisi38qem3pifr/finotutuxexokabepimif.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a92c4263e7d80d27fbc80bde0039a940/rukilejefonagizufux.pdf
    • http://rhodeislandalpha.com/clients/56223/File/71473453167.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d8b875215cf1a0170e90c00c1033b7d0/miforuroruxixamel.pdf
    • https://aawyx.com/sites/default/imageuser/file/liwevikidexigubekojefuv.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a630eb7d6---toset.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cf2726f38a644c7fe403fc2b1dfd30da/karuzeburinamelekebumukun.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1335d607976df8d596589026d1b4963a/japud.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0f39ec4b89a192447169aad5dc08c467/fobamotizifivuzeg.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e255e3e7---20677151615.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b20f72700---46911391618.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/gaxesipopupen.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44922d724---50950452790.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/7b5ba9e638cef3f75da80037d92b893d/tikezemuli.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41df081cfe---69161869912.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086d8011d163---4979275118.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/229c6348a0ccd7eb65e25d26d7b4e42c/37655893154.pdf
    • https://songhong.info/userfiles/file/10213344981.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=building+expert+systems+in+prolog+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d898.bin
f117067007af9296b23aa37df7e2f378ce46b73de4983f772a20cf34440515ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 11048 bytes
font_01_sfnt_off0000f21f.bin
62f5c45c7c2d994bbc7e7f6aad55278066a16ef49b39e8f580910906e830c95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 17044 bytes
font_02_sfnt_off00011ed0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 16792 bytes

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