PDF malware analysis — malicious · a9fcab59abec6344

MALICIOUS

PDF

82.7 KB Created: 2021-07-21 03:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 7144201cc8cdbe5301046477e1542d18 SHA-1: 027ad5712a522e566d06910a91c08f655f9b6640 SHA-256: a9fcab59abec6344ab6df4a3f2c08ac801058d745ba3d26641a5e2622b3bc7d8

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 a link farm pointing to numerous compromised WordPress sites, likely serving as a lure to redirect users to malicious content. Although no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to lead the user to a secondary malicious resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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 http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/77793910828bba60561a247b13d22cab/62419119197.pdf In PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ufos51gaja604brih55gir9rfo/10548143588.pdfIn PDF document text
- http://www.emailposte.com/pictures/gojagiga.pdfIn PDF document text
- https://remoteyourstaff.com/calisma2/files/uploads/20432197947.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55af39dee---75405709042.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/f551e6161fdbb3128ef6c776e54acb0a/gomisajavegoragoze.pdfIn PDF document text
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/k4dv0q54gtpollsttlgc5tt6nm/53898364473.pdfIn PDF document text
- http://1utilaje.ro/mm/file/tobomibudagamomepomib.pdfIn PDF document text
- http://dienlanhlongan.com/upload/files/55344854468.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/srlv72ngq1ofsqphkgj80u59su/tizanataximitodomasar.pdfIn PDF document text
- http://snap-drone.com/userfiles/file/nubuzoromezojewedam.pdfIn PDF document text
- http://rajskiewakacje.pl/userfiles/file/dirakorewiwoxoxapamote.pdfIn PDF document text
- http://gapp.fr/medias/files/77796313519.pdfIn PDF document text
- http://nousgarage.com/userfiles/file/43435140031.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fd807d460---51616991030.pdfIn PDF document text
- https://airbays.com/userfiles/file/78839243163.pdfIn PDF document text
- http://nagymester.com/userfiles/file/5459533896.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bdheosadp5b34gmt3ggpm9cch1/81960782228.pdfIn PDF document text
- http://valleypainclinic.org/userfiles/file/vawowezuxixitopozidemu.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a2568002760---feditazepafizuguf.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78380c140c---97145803560.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l673250ctqh4sqoqh02as5ocec/51229543470.pdfIn PDF document text
- https://standardpromotion.com/images/upload/userfiles/files/felizifodipagotekuxolupi.pdfIn PDF document text
- http://chinajnbt.com/images/upload/File/79609014299.pdfIn PDF document text
- https://thaiahpa.com/flash/files/puvowa.pdfIn PDF document text
- http://meteosputnik.ru/userfiles/file/1192219174.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=a4+height+in+cmPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e217.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE217	10140 bytes
SHA-256: `14412b35af246e80acb872d2aba51285f41a453094eed1cfef7412dd2fa8b9b1`
`font_01_sfnt_off0000f89b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF89B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000110ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110AD	17152 bytes
SHA-256: `62f7fd2920fdb6cf01c9f49cdaead6a0f7cd856b08c1984ce2edfedcae469a49`

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