PDF malware analysis — malicious · ee3835b114766a23

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 05:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 77e6a71baa4c50c43a4bd9e3847fde59 SHA-1: 8fece883b10b21e4f30772855aa7ecc25928fdf2 SHA-256: ee3835b114766a231c71e7b30e3311019ca59c1a1c49858b098fd4549d7ed552

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload directories. These links likely serve as a distribution mechanism for further malicious content, such as phishing pages or malware payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27618c777e---nadozobotagokutamifobe.pdf In PDF document text
- https://mariapolis.net/ckfinder/userfiles/files/54149340496.pdfIn PDF document text
- https://yarpaket.ru/userfiles/file/28971016437.pdfIn PDF document text
- http://yjsyrj.com/userfiles/file/23023202773.pdfIn PDF document text
- http://fiumevivo.it/userfiles/files/nugimuvalokabulevanago.pdfIn PDF document text
- https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a7a5b94040f380f62c40e7f4f57d7485/birukomisusopepinidum.pdfIn PDF document text
- http://kdsonline.org/userfiles/file/sifojabanojixikulu.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/11c9a965af119179f3f4946b27f158a0/tipenedikamagukulobizax.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/00be9cfc9e75b8b8b7eefa20409bf4d7/rorowovexuxalapig.pdfIn PDF document text
- http://cga82.com/admin/File/beguremu.pdfIn PDF document text
- https://hamasataccessories.com/userfiles/files/16455108823.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c82361ea0dd93cc44960613a8103a5b8/didasixoj.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/654bdf6bae5f84b1f7407fb37cbbaccb/15975928803.pdfIn PDF document text
- http://otelm4b.ru/admin/ckfinder/userfiles/files/29074570394.pdfIn PDF document text
- http://lasfyy.com/uploadfile/file/20210706115200346.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nn6qo6f0a70ddl56vjc9kjgt6m/filuxogewok.pdfIn PDF document text
- http://frickcontrols.com/uploads/files/bopusefoxow.pdfIn PDF document text
- http://ecohort.com/userfiles/files/resap.pdfIn PDF document text
- http://com123.vn/uploads/file/85863483221.pdfIn PDF document text
- https://abe-rdc.com/userfiles/file/fidewaseralef.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea889bb37---kuwanetipaxasob.pdfIn PDF document text
- http://manilag.com/FileData/ckfinder/files/20210728_293CE464C328A0E3.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d92feafec---sisumeviwilolekevaxinis.pdfIn PDF document text
- https://artlabjo.com/userfiles/file/34687479334.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nk23emovj4mh6u862rsjpdvjg3/1313666785.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=define+homophonic+in+musicPDF 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_off0000e457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE457	17608 bytes
SHA-256: `e99ff11afbcfc3e11c53ef0c49c75171402b2c39cf537dd8e40f306ea33b7159`
`font_01_sfnt_off000110cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110CC	10440 bytes
SHA-256: `2c60b306827851b04985a593d4e2755033d610f9f6520b0ccb5a8e236d53a5cf`
`font_02_sfnt_off00012840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12840	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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