PDF malware analysis — malicious · 1b2570cf20033b6f

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 943aa05d313d57b7c1705c4c457815f7 SHA-1: d49ec91bafb2c3693cd3c90044e73ec0f49caa72 SHA-256: 1b2570cf20033b6f24e162d9df2a0bfdebd2ee104dffad7dc3d1f14a539aba49

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 a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of link farms on disposable hosting further supports a malicious intent.

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 https://dubaimotorcycletours.com/uploaded_images/files/6354223083.pdf In PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/7bl8l9vreqnfdgfd6sdb8d3qfc/6979743149.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/r4fdc2748u1aahqb2ecmmnk9o3/lusodilawuvexopupale.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bca5e83138---welusifija.pdfIn PDF document text
- http://vishwkarmaenterprises.com/webroot/img/userfiles/files/zujejefalurobululawotumo.pdfIn PDF document text
- https://medtek.vn/storage/file/71868376512.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/134f2d974e87edd83ac0890b29b90ce3/96930271961.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33936b7d00---meketifonagazavutamape.pdfIn PDF document text
- http://villapellegrino.it/userfiles/files/45891461755.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/5cb2262d722b4f29026ec52ee3b526ee/faripinedabivifazanij.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/29415524933.pdfIn PDF document text
- http://goldcoil.com/uploadfiles/files/fiwisokutukuna.pdfIn PDF document text
- http://agiusfuneraldirectors.com/files/file/livifabubunif.pdfIn PDF document text
- https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/574048b5e4219790dd2a59d360e31a7f/nokavidatitobosezoxev.pdfIn PDF document text
- http://zonwering-belgie.com/ckfinder/userfiles/files/98749158775.pdfIn PDF document text
- https://akapacha.com/userfiles/file/zuximijigeladozoburuki.pdfIn PDF document text
- https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070828909584---87426513832.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/569f89c96d4ec8a301abcd0518485493/39135273694.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/8699661308.pdfIn PDF document text
- http://xn--o79av69abka850ab6c.com/upload/file/202108201355385092.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0615931c8a---25772047333.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095b780b75aa---juvesipa.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3c5ca63063f54cbfea63446fff743e8a/kusupenenuza.pdfIn PDF document text
- http://bagliodeimille.it/userfiles/files/75856982265.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-6-4/20210604203206639152.pdfIn PDF document text
- http://www.almansori-ye.com/almansorifiles/files/47053859044.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=difference+between+npn+and+pnp+transistor+pdfPDF 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_off0000da7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA7C	17404 bytes
SHA-256: `bfa64ccd8b8fb5746cdb6032246ef7ee7923fe434578263285a082c824ab937c`
`font_01_sfnt_off000107da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107DA	10792 bytes
SHA-256: `061213895f37ce48fbbc56712405f1552278ecff7463092a6fade9e577c6bf64`
`font_02_sfnt_off000120b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120B8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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