PDF malware analysis — malicious · 16d433d31921fa72

MALICIOUS

PDF

79.5 KB Created: 2021-07-14 02:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: d7845e7b0d59cf8e4ddc42dd1afd1217 SHA-1: 4b9add217b17595c9292d0048b07e398550b49f9 SHA-256: 16d433d31921fa72d8d8fc0700c9ad9e957fc0d5a57b21e54dfc5614f3da93cf

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://ketchas.ru/uplcv?utm_term=how+to+determine+turbidity+of+water PDF link annotation
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e56aa49558d---13145633974.pdfIn PDF document text
- http://mytmbc.org/fckimage/file/xudutowesexo.pdfIn PDF document text
- http://jatechkj.pl/upload/fck/file/36608185469.pdfIn PDF document text
- http://cayxaotamphan.net/userfiles/image/file/72672207882.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7fa3205be53d4dc85d3578f147e6bfb6/32147717481.pdfIn PDF document text
- https://art-lamps-rali.eu/files/file/65664738225.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989d7001a33---polunaxamufexe.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/91be2567577d3f0bde8276a917cbdf3a/7816741353.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16091a12587ed9---xovavovagifosebamagutoti.pdfIn PDF document text
- https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/905f48a1dd087553012c1b95a5592523/54397014197.pdfIn PDF document text
- http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/63456957254.pdfIn PDF document text
- https://binarbaidrealestate.com/public_html/userfiles/file/xiwejutafarewe.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da490acc574---9863936537.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/95c9a03a08a3569000d9da64ce9eaa2f/xokajarawebuxuligivilig.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaaee5263e---14715415598.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071978d7e0db---2284020479.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a07f7ee21f2---13857072428.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/l9hdcgdgoqt1a3hco1k2o9thsv/siwubopakubuduz.pdfIn PDF document text
- http://carshopm.com/js/upload/files/bozatibetubiwokixizaki.pdfIn PDF document text
- https://adikkeempat.com/contents//files/wesurafovunag.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/muzisom.pdfIn PDF document text
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/1602bc9fedaa9015ad1a46f7c2f26051/43337317750.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/hfm5o6g6po1o64t1na6l96hd43/71304807100.pdfIn PDF document text
- http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2ba6559844---27053954104.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160755bf4063bb---28934666559.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_off0000d473.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD473	16592 bytes
SHA-256: `e1c6d927c1fe541e71bc3bab731f8ba4dff4bd42527da60ebaafff8a7d636df1`
`font_01_sfnt_off0000ff95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF95	10732 bytes
SHA-256: `6969f4375e8d7308b716c4014232feec0fe50f9269060665cb25bd66e5f4eb06`
`font_02_sfnt_off0001183f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1183F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.