PDF malware analysis — malicious · 2a70bad149161b98

MALICIOUS

PDF

84.5 KB Created: 2021-09-04 14:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: a36dc2d8ca66c662052d6075e89f2ff8 SHA-1: 718c4f4813522529a2ac552efd7dd195674c2418 SHA-256: 2a70bad149161b98aa30034fd7a9234c7e98c6292704d2d822efce4f0f814251

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to compromised WordPress sites and disposable domains. This behavior is characteristic of a link farm used to distribute phishing content or redirect users to malicious websites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://nomylo.ru/uplcv?utm_term=astra+j+2011+manual PDF link annotation
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d3cb2ed54---nutomeganunigawovanij.pdfIn PDF document text
- http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/xonovunediwuvipo.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/fdc8b477babbd6e11e1a8d5799d72c31/61169227085.pdfIn PDF document text
- https://siroyensao.com/upload/files/dalewenikupolisudora.pdfIn PDF document text
- http://hersheyhigh1981.com/clients/37302/File/zarolabotuvif.pdfIn PDF document text
- https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/igmkilld8ja9a201au0sbf7e6s/nuvezanuvokitarewu.pdfIn PDF document text
- http://budohurtsa.pl/userfiles/file/35912107864.pdfIn PDF document text
- http://oodow.cn/upload/file/210621142131151365hog5pitbmisb.pdfIn PDF document text
- http://modernplating.com/userfiles/file/73646484994.pdfIn PDF document text
- http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/pulolavowop.pdfIn PDF document text
- https://topinsolventa.ro/userfiles/file/52463300709.pdfIn PDF document text
- http://alrabbanoilandgas.com/file/files/kugexonekaromub.pdfIn PDF document text
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/djdvapi2jk9upqpui167rbuibd/zatogu.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/abb5505a4d3172d4fe182ed38bc26586/56573776505.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d18c1484---rigemijawixoz.pdfIn PDF document text
- http://learningkey.org/userfiles/75434285111.pdfIn PDF document text
- https://migger.dk/userimages/file/67290906873.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/60tbhspsq9tpfrq7s0b9f6vl74/81948741103.pdfIn PDF document text
- https://ever-progress.com/upload/files/nitepizigisu.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609680a7d95d5---muzozitixafimepagugur.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c4e3562d1---sajavak.pdfIn PDF document text
- https://www.jdconstinc.com/ckfinder/userfiles/files/panetanopuro.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8fe64c05b49ea772a1f0432f6f40c1bd/peroroful.pdfIn PDF document text
- http://rollfactorytogo.com/uploads/files/rogixuxikegoxufuj.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/58167989385.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_off0000e84e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE84E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010065.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10065	10428 bytes
SHA-256: `95201303dc15a322ef9665df9086d6b43961d5ba0b4775572313a1322cc4fc9b`
`font_02_sfnt_off0001182c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1182C	17128 bytes
SHA-256: `2e0164757ea4fa6acad2428991e3f2ef81c791bbb830254d4da563decaecf281`

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