PDF malware analysis — malicious · 5db6558e74f996db

MALICIOUS

PDF

92.6 KB Created: 2021-03-15 21:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 801c3898a6560722f485631f26624d24 SHA-1: ac29be44047fe5e2a97fcda4a4488f88a76004c4 SHA-256: 5db6558e74f996dbf2ee3c8dd8426f7e835acaed9964ae751418666da0b05d31

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are hosted on dynamic DNS services and appear to be part of a link farm designed to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of numerous suspicious URLs suggests the document's primary function is to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://ponafet.ru/123?utm_term=xml+formatter+for+notepad+64+bit
- https://cdn.sqhk.co/zugeketinog/jhbcBp2/first_grade_math_worksheets_common_core.pdf
- https://cdn.sqhk.co/tosilura/tmojegh/voxinolaluvixomerekevuwe.pdf
- http://wazinufezil.iblogger.org/employee_training_and_development_by_raymond_a_noe_7th_edition.pdf
- https://cdn.sqhk.co/jotapepikota/eihQzGz/steven_universe_amino_apk_1._2._1.pdf
- https://cdn.sqhk.co/jebuxanit/hal22Zi/audio_to_text_app_for_android.pdf
- https://cdn.sqhk.co/tajiwikiter/MgiVZPC/suwugulapa.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/821953bd-0a78-438e-9941-b489d23debd2/mbti_test_reliable.pdf
- https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_bd2d635ff218400a8c9acb8fd4b2c739.pdf?index=true
- https://uploads.strikinglycdn.com/files/5f016e1a-50c3-42d3-98ed-afec206802de/tl-wpa4220_custom_firmware.pdf
- https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_07de62d99f954a4f9ecb722b2e12c8d5.pdf?index=true
- https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_d286ee72668c4e298e8f5a5e6ba95adc.pdf?index=true
- https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_93864f23e6c84b17bdbefc339a3ce294.pdf?index=true
- http://remivipe.rf.gd/god_is_not_one_stephen_prothero_ebook.pdf
- https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_bc185eb831d54e9d90eba4d20c53fabf.pdf?index=true
- https://uploads.strikinglycdn.com/files/442a0c36-b333-46f1-b95c-db4439ac38e6/yaesu_g-450a_service_manual.pdf
- https://uploads.strikinglycdn.com/files/b7c6b969-e229-49e3-894e-d4cd45f73ef8/lijefoko.pdf
- https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_5a4e203b907c44f99bf06a387f13eed3.pdf?index=true
- https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_e3bfae12cdf848948c416a353e64f97d.pdf?index=true
- http://jezuwujitek.epizy.com/certificado_de_cuenta_bancaria_bancolombia.pdf
- https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_63b401694fe343acb2de0d1c3a99c7db.pdf?index=true
- https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_7ef702201a194101a0cb97b765701fc6.pdf?index=true
- http://mujigivufutufu.rf.gd/purutixikinibi.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
- https://savannah.gnu.org/projects/freefont/
- http://www.gnu.org/licenses/
- http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010fe8.bin` `6749277a39394bebd886a98063a7ba02dc0ef822cd53f0d32034d2c476af8c9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FE8	5368 bytes
`font_01_sfnt_off0001220d.bin` `b4d6b2a25f8389920d9a9ac368d60cf986f413ac6255e9a224610e18c5b2024c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1220D	16652 bytes
`font_02_sfnt_off00015596.bin` `a120c2faf4885b5ec2ee6116ee67ca8477eb8abe069495858eee7a4a85f4f5ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15596	6188 bytes

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