PDF malware analysis — malicious · 992c85dd9201bd06

MALICIOUS

PDF

86.2 KB Created: 2021-07-08 07:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 9f9987942281ec859e39fddbed5655b0 SHA-1: 1f04401564445c0ffcde93a08c8441e5cd1d9d32 SHA-256: 992c85dd9201bd06ff6420bd559aebd52831655722fb14839e9d246ec2367fe8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to compromised CMS upload storage and disposable hosting. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a6e5a8a75---8631818480.pdf In PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f15a62036---99546033403.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2404ed06d---liwosasajalejosipoxud.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3db7c4610---96344547413.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160912fb300fe7---zagumuzemuzol.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ueh5obdchagadulomn29f9ad65/65839936546.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/78tbgmjcopdv292104bga7jb76/97418295497.pdfIn PDF document text
- https://mangonebike.com/uploads/file/fobudafovul.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/t35aln6a74rdddm26pnc76j2nc/12253408344.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/c7354f75d8e2bdf13e32c81e1b0413cc/kazarujopi.pdfIn PDF document text
- http://lab4050.com/upload/editor/file/4459088216.pdfIn PDF document text
- http://valaptop.com/ImagesVA/file/bodijoxevimupunelagubu.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b7ca3703a---xejimaporimumuzisozir.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccc4ecb09f---fedofedevuzesuxudekudiz.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1033d4e803d37560030596d0125ad778/11635588470.pdfIn PDF document text
- http://phongkhamthienhoa.vn/images/files/2757000734.pdfIn PDF document text
- http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/wodazovaf.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f06bb684b8---90577208814.pdfIn PDF document text
- http://webbuilders.com/files/file/megujanowixunekatudokam.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16091667ca182a---4630263895.pdfIn PDF document text
- http://naitikfashions.com/ckfinder/userfiles/files/mumuleji.pdfIn PDF document text
- http://livingkaneohe.com/userimages/vituradaval.pdfIn PDF document text
- http://clubselectionvoyages.com/images/file/47355259787.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/79e5bf3317f7b5924a197e31fccbc544/52694123259.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/98546814109.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/larini.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ab125ecb4---35723763943.pdfIn PDF document text
- http://odnoklassniki-files.ru/images/uploads/files/fuxisenoxolixuputaga.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=is+under+a+prepositionPDF 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_off0000f039.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF039	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001084b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1084B	16836 bytes
SHA-256: `007ad4119e39278d7be202ba07a3ba4349f565c2585d566bcaaed1aba49444de`
`font_02_sfnt_off000133d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133D4	10392 bytes
SHA-256: `60e1c73f2792b95e851b0519780ce2118846bda1e7dd68dba649e55fec5217c0`

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