PDF malware analysis — malicious · 2fcf988275e05e02

MALICIOUS

PDF

75.5 KB Created: 2021-04-28 05:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: feff75485e7869f259142cdea4f6bc7b SHA-1: 085e4269c341ce0b39be448f6cec24035fbb6632 SHA-256: 2fcf988275e05e02bde6482fdc38a7adc7a40a7931d56e2ea3204961dcf0fb9a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised CMS upload storage. The document body, though heavily obfuscated, contains text related to 'statistical data analysis report examples', suggesting a lure. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/9c232ed9f3780497d7e5d2e949ea4646/rolodufemu.pdf In PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0be2042e0---10316958599.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e722246f1---71139413487.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608584ed3f66b---zewejofexufijefej.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607925cc0f825---93157114061.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c763eb23a3959fce1abdb418dc040f4/vuvuwowojuporejerisa.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed0911f27---34788124472.pdfIn PDF document text
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/9f7c66afkkllehmuv92us34l26/fuvimuvu.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e2b38080f---1604819041.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/e29ce655dabdcc92a4120fe663fc3dd2/17043065560.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078477ee0c6a---10578891204.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/eda3c1e29123e248b3eb4acb9e0fe2e0/70794373554.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f112b3e17---dibolaxurixanokekib.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/01tenvilqm8vkva1j61p0ibtu0/5084968939.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608395c06ea81---vemaz.pdfIn PDF document text
- https://actorconseil.com/files/file/nitodofozogoju.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087553b27627---38935663230.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=statistical+data+analysis+report+examplesPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD0C	5280 bytes
SHA-256: `37d000b389f8e76ab5627578d6bde8a0a999dbf980b9820a804cec63dd16f6fa`
`font_01_sfnt_off0000eedf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEDF	10440 bytes
SHA-256: `24c957222cd3102d7cfdc68200deeda80139c17ba7c627eba7f2ce5e4902bb0e`
`font_02_sfnt_off0001129b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1129B	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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