PDF malware analysis — malicious · 01b5126b2beb485e

MALICIOUS

PDF

87.8 KB Created: 2021-08-13 00:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 5ef74f9ff0814afc5575490a8dd241b0 SHA-1: b595e7053542e236c668f4e3ac943f57bd473c45 SHA-256: 01b5126b2beb485e9357b9e88a9a340f3b01ef4456d3b10fd68744401f5b91cc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm designed to obscure the final destination. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://digitaldaya.com/imagenes/file/sebosasamonozakufum.pdf In PDF document text
- https://medicentrumnz.eu/medicentrum/files/file/19139477732.pdfIn PDF document text
- http://daaeportrett.no/upload/file/kiremigufefaz.pdfIn PDF document text
- https://kudamatsu.org/userfiles/file/89906761566.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610abb44eea50---55376572942.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/a00c7c050d0b6f59bc2449b9e4af1feb/jopubizivatu.pdfIn PDF document text
- https://centrorevisionimonregalese.it/file/12752730214.pdfIn PDF document text
- http://seabeachthailand.com/UserFiles/file/67473842104.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/modamitawefuvovaxexowovo.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/71404532695.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc62183298---10103648496.pdfIn PDF document text
- http://szymonadamczyk.pl/uploads/fck/file/52416305333.pdfIn PDF document text
- https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dda76b12bf---xugusoleno.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a74df1e6d03---82453448024.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7d1b283664f208cdac9f39dcf58f024f/70266607664.pdfIn PDF document text
- http://kyanite.tv/userfiles/file/26188553868.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/nimesunakot.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ace917afa---99365381966.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa8c163af---danivedesawifarigines.pdfIn PDF document text
- http://interel-rus.ru/test/sites/default/files/file/92219807111.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/709f3739ea5330497d42a0e5033804fd/lijulod.pdfIn PDF document text
- http://the-bom.kr/upfile/files/zojijarusutexi.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073801f99b62---lexogetaweru.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096cf20d909c---44089081160.pdfIn PDF document text
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/ef0e0cf5f4f75cd303a43d11f0777b5a/banapomadixosibaronu.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/69586467939.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=should+you+use+hashtags+on+tiktokPDF 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_off0000f1cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1CC	17868 bytes
SHA-256: `c5d82ef5ee1793cb0c727e876921880e55789f6297c8af30d444cd3966e26f7a`
`font_01_sfnt_off000120b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000138c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138C8	10808 bytes
SHA-256: `ffb59026eb7ba4658b7eeae57b8a477391477ea0895f05ea260e0dbf267d2595`

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