PDF malware analysis — malicious · 2d4207ae96ec3a11

MALICIOUS

PDF

82.6 KB Created: 2021-06-01 07:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: f4a617a7da4b9ad5ff436c7c1dc4a990 SHA-1: 1a1fea88f653f3902c8ff366ab12dc8d27963ce3 SHA-256: 2d4207ae96ec3a11193c468616a49bf8a458af64865fef57a06d597e614ccdc9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous external links, many of which are disguised as software downloads, such as 'java jdk 1.7 free download for windows 10 32 bit'. The presence of multiple disposable hosting links and UTM parameters suggests an attempt to distribute malware or lead users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://crysiq.ru/pbw?utm_term=java+jdk+1.7+free+download+for+windows+10+32+bit PDF link annotation
- https://cdn-cms.f-static.net/uploads/4493569/normal_60195675ecd3b.pdfIn PDF document text
- https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/miniwubipozuju.pdfIn PDF document text
- https://gujejitemisadud.weebly.com/uploads/1/3/4/3/134354005/9971768.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4474750/normal_60b014192811f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490370/normal_6043efce6b6b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450635/normal_6024b06831bc6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369146/normal_6006549ce8728.pdfIn PDF document text
- https://semazuxogevagox.weebly.com/uploads/1/3/4/0/134017751/0cdb99f73a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378619/normal_60185104118fc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456114/normal_5fe1511395bfd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480173/normal_60589331f2145.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409604/normal_606b69f41e7c2.pdfIn PDF document text
- https://zixatemanareku.weebly.com/uploads/1/3/4/4/134472678/3b8ce15f3.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/57cccef2-eb58-4d94-b5f7-900525f15cf3/18370186942.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3a1d8d1a-a429-46e5-9782-7e4925e2bf94/fezetizefamuvafogenarasif.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1837d22c-eba9-43a8-99c2-6685a8d92cc8/gta_v_activation_key_generator_pc.pdfIn PDF document text
- http://nigezid.pbworks.com/f/42297063644.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/572ccc4f-7299-4f79-b044-adec8b162f8a/how_to_get_out_of_a_lease_covid.pdfIn PDF document text
- http://xedidovetaw.pbworks.com/f/onn_bluetooth_headphones_user_manual.pdfIn PDF document text
- http://zajozote.pbworks.com/f/47466700590.pdfIn PDF document text
- http://wuwazilizos.pbworks.com/f/41261868018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/987a2959-91a4-4706-b65c-4d7cb6f37c65/taylor_scale_model_1250_reset.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e9accfef-0a0c-4578-a4af-b9bc4a938051/51258067511.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0994634e-14ad-42f0-8e27-02aeea1f6f05/livro_sempre_ao_seu_lado.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://scripts.sil.org/OFLIn 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_off0000e302.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE302	5924 bytes
SHA-256: `8553e55a9a57cbc73e8260abb8e3145a39431be6e3831ce5c16de99b0e3c9b5b`
`font_01_sfnt_off0000f76e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF76E	14540 bytes
SHA-256: `fa5e29b2fcac519e5ca4b2dc2419037c24a2f919ab50f6a2adc21a0f43d4f6c5`
`font_02_sfnt_off0001253a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1253A	16060 bytes
SHA-256: `2cca29575edef7a9880cf400a7847cc5df22ba1ee7edc19c7b9bafe603f6c979`

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