PDF malware analysis — malicious · a9239232da6e2833

MALICIOUS

PDF

78.4 KB Created: 2021-08-05 19:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a536e800653f4f93c868ee1c97af4ac9 SHA-1: 5d77bffe6fc8eb5d80af0d72786e2b8010dcea39 SHA-256: a9239232da6e2833fc0ec867a020f76e5b8525d8926e3f1e53b6024611ec8bf6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URIs and is identified as a link farm hosted on potentially compromised WordPress sites. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://allytemp.ru/uplcv?utm_term=john+deere+313+skid+steer+parts+manual PDF link annotation
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ec3fb5406---vivipaponalaxopiterilidi.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7npff98sesc2vdtiq8b26ce6k5/60910105551.pdfIn PDF document text
- http://maynenkhiinverter.com/media/ftp/file/kixetakotazakuvurevojep.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/4e9a86679d9116f89397ef7476558b54/2819491033.pdfIn PDF document text
- https://amatnieks.com/pictures/image/7569139269.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/115355dcf900a5261507a7300ebd76a7/witofokapujekavezupubib.pdfIn PDF document text
- http://master-sign.ru/ckfinder/userfiles/files/69076994970.pdfIn PDF document text
- http://grupopiscis.com/upload/files/23407282948.pdfIn PDF document text
- http://yonezawanet.jp/units/24250/zcycom/files/70811125947.pdfIn PDF document text
- http://cedule-plachty.cz/files/file/walexujipifenolunijuf.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/48a3a6bfdf346abb959d94b8a48288a8/kaxarobewe.pdfIn PDF document text
- http://stylowa-pss.pl/userfiles/file/naralivedesiwulawewalax.pdfIn PDF document text
- http://komputerzagrosze.pl/userfiles/file/89232954377.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/0efk8sr8lb0ch4m783in9atrl4/58403530614.pdfIn PDF document text
- http://jatyn.cn/upfiles/202107/file/1625633502.pdfIn PDF document text
- http://hzbmsj.net/images/upload/File/wojaburofekuxasi.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d75b691f81cdb61bfad90b0df5cca910/novajimiza.pdfIn PDF document text
- http://phayaotechno.com/UserFiles/File/wevepuvida.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808a886c3e---taxenamonago.pdfIn PDF document text
- http://inbeeldt.nl/userfiles/file/83964632236.pdfIn PDF document text
- https://tidurmalam.com/contents//files/86848419656.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c30b1c76---tujibunupupoba.pdfIn PDF document text
- https://exihomes.com/userfiles/files/lomuzukedudajipubu.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/56145978602.pdfIn PDF document text
- http://af.ssla.ru/images/fornews/files/kupogofakafaxini.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ce7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE7E	16428 bytes
SHA-256: `6441828be7494de2fbbda0f7d37c3c233dc9194c439be92d9df971c3c4b3ffb5`
`font_01_sfnt_off0000f936.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF936	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001114d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1114D	11064 bytes
SHA-256: `85635d883b9335a60076b2ebee10f8eda17ca459bb5ae5c0ca96847d4877fb70`

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