Malicious PDF — malware analysis report

Static analysis result for SHA-256 6032448067cfb3cc…

MALICIOUS

PDF

113.1 KB Created: 2021-06-25 19:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d00fd09ef5b3c5b4732fc489ff1e15a9 SHA-1: b08550b6c22722aaf345c744cc3b952adddba66c SHA-256: 6032448067cfb3cc97cd7c345458a1167c5b89401c8067d792f44d517820d991
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link farm pointing to compromised WordPress upload directories. These elements suggest the document is designed to lure users into downloading further malicious content, likely a phishing page or malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=red+flower+blue+thorns
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c93279358---dafenatutumuk.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/6048afb274e2e8a78f61cf5ead7cc145/5069227687.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086f37fd1b2b---95070333432.pdf
    • http://doo-san.com/userfiles/file/20210519212845.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/hrjndprikjf1usm798jio708m4/40097492229.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/e4664f3654b652744c31d938b2ca0b32/21703585939.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/92aafd84ecf048803776c5e2c835fb2f/40773329368.pdf
    • http://childconnect.com/swi/fckfiles//file/19219463327.pdf
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/wakamogudopotufosiwagoji.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1541b9072---ruraki.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a161bf88b01---38587709731.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/22442697096.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/48285151738.pdf
    • http://cokhixnktientien.com/Images_upload/files/zusumalomoforudeni.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/8h2spm35geo5qk3m9075q6ib8b/94733044087.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a046f06bcb---96140163480.pdf
    • http://orderleesushi.com/uploads/files/92670778505.pdf
    • https://brod-plovdiv.com/images/14615564027.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb8586bba---dakevuwuvutezojujakixilag.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d579ed37ce1ed604ff9692b01e8c5ced/lezuvave.pdf
    • https://ive-cal.it/file/67720519098.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/34op01lh806mtebnir6qtfb035/xeloladelutepatato.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb625ef428---nejidikibuwadujipe.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad55b5791e1---josevixonosepudumomin.pdf
    • http://jandebruijn.com/uploadimages/files/werupisomijazozal.pdf
    • http://stinpo.com/ckfinder/userfiles/files/lareweb.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c96d3c37842---jifowururenanimiware.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/47cb98kcvkl4dqfso3050dp312/37573998311.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_off00015912.bin
2600f05e1044f0ae1991e6751ed4ee75fcf9c0d74e3dc9f4d24880355b08e88a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15912 17328 bytes
font_01_sfnt_off000186b1.bin
4d5bfea172d15faf7350ad6360ca45cdde737a593e9eca1d5a5ecdb59afda903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186B1 10568 bytes
font_02_sfnt_off00019edb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EDB 16792 bytes

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