PDF malware analysis — malicious · 3647a965496e0edd

MALICIOUS

PDF

79.8 KB Created: 2021-09-03 14:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 569c23490e8ebb9f9837a9e829c08a01 SHA-1: 0d7f80305448c3237e2b9b617ea5de34af69a864 SHA-256: 3647a965496e0eddd8ae2116ea224d98f310293ae4e689e9b634deea9372eec1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b7c1cc3d---22350587682.pdf In PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/215b020a7ec5483ea5c0006ffac82219/lojavidolus.pdfIn PDF document text
- https://lescourailleurs.com/upload/editor/file/58755612967.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ff92db462bc6435e439c79e47a166682/50248112344.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ifc59qc58icei59pso5au9u2bo/tezira.pdfIn PDF document text
- http://refah4ter.info/basefile/hotelrefah4terir/files/70532045064.pdfIn PDF document text
- http://computergramm.com/userfiles/file/35802437293.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bccfc9b2848---36084684163.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079772c318c2---38565192959.pdfIn PDF document text
- http://cutyoursupport.com/userfiles/file/27871922041.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/xewexanejosikatemag.pdfIn PDF document text
- https://astefin.ro/ckfinder/userfiles/files/70064817357.pdfIn PDF document text
- http://erbamedica.org/userfiles/files/jusivewopozukijif.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd33b752f9---24440616303.pdfIn PDF document text
- https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/tagivegabovob.pdfIn PDF document text
- http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7a6a66ab5---21214142659.pdfIn PDF document text
- https://mrdak.cc/uploadfile/files/vubakuzipejazejeliv.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610e42feb9486---82203833180.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee6f79747d---83949109279.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbcc8b2ce9---mapiwij.pdfIn PDF document text
- http://dostrojar.sk/UserFiles/file/pajiwezelirafex.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c10268a9f90---63531346614.pdfIn PDF document text
- https://motacademy.it/file/vofasuvikoripige.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ecd57c70f063b886870e26a46255435/mopuxifutide.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af98b78d681---20939417670.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831c1ee58ae---94168171486.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=combining+sentences+using+subordinating+conjunctions+worksheetPDF 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_off0000d25f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD25F	16988 bytes
SHA-256: `c1856656f6c0b516b2fd830ceb6f6f3ba9ddc9ae4aafd4cc1e7294d1df511aeb`
`font_01_sfnt_off0000fe4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE4B	11348 bytes
SHA-256: `bf6020986633ece9f77cb03e491d24e8fcc2001da29eba55e9ccab709e46b22c`
`font_02_sfnt_off000118af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118AF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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