PDF malware analysis — malicious · d4f62cdc5bc98330

MALICIOUS

PDF

80.1 KB Created: 2021-06-01 19:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 16856c7d9b623edc99a8b83627544e8d SHA-1: 84ff508e4a0ad035f13d65d1ee63fff63e43c625 SHA-256: d4f62cdc5bc9833076186270821fef27594e2703b3c4776516d8d79c751ded11

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8730

Heuristics 4

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.
External URI info PDF_URI

PDF contains an external URL action
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://krisoc.ru/pbw?utm_term=zanki+zero+stage+4+guide PDF link annotation
- https://jutineriru.weebly.com/uploads/1/3/4/8/134866815/1496473.pdfIn PDF document text
- https://boluzevorekov.weebly.com/uploads/1/3/1/3/131384542/xigudapigo.pdfIn PDF document text
- https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/7091757.pdfIn PDF document text
- https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/bfb1e076b35648f.pdfIn PDF document text
- https://wowifowukanu.weebly.com/uploads/1/3/4/6/134634936/gokirurusigilusa.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/92bf6956-8357-4d80-9869-cc5fa0cad3ae/43998425031.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/64b01638-0b49-4f4e-81f6-593de39b0a0a/bogafowebudogujerona.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa29ae43-56c5-424a-880b-ab96a789f1dc/how_do_you_convert_a_to_a_fillable_form_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee5f274b-5175-4cc2-b529-a9a3bd32ce86/38196289264.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/da286320-7903-4929-a21e-38a911ea2ab6/how_long_did_greek_performances_typically_last.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5fb6291c-97d4-4d8c-9919-ec8ddb273f92/janome_hello_kitty_sewing_machine.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6564f42d-7d40-408a-9c41-4350688accb2/esl_list_of_most_common_phrasal_verbs.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f5d7dddd-179e-4aca-90a9-f02db3f313e1/dofipawosawabitexiwewiza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b825425-cafe-4f73-82e4-2527e7bba818/kibig.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e0431ad3-854b-4943-9443-5f0ef290368e/properties_of_matter_lesson_plan_high_school.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8169152f-4112-412a-866d-3f81952ea4dd/tibalukifugebolupawinarev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/556f70cf-1b47-4fdd-afd3-5e0a9f78ac89/mevufitode.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a7c2010f-5c0f-42bf-8351-7c2d25cbe668/sifuwugezawepuwabowefevej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd8bad02-ace1-4eb9-9b8c-ca03ab1051a5/bupamomusukiget.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b1a6d27-dc28-485a-a11b-6221025f2b71/is_steamunlocked_safe_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d774fc0e-5713-4947-aa8d-2a3f97106c4a/toro_gang_reel_mower_parts.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/38f63d3a-1348-41c5-94c8-2e1a6946aa0d/44151190254.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b42f8697-823d-460b-a37a-9d9cf74afc66/what_does_restrictions_b_mean_on_a_texas_drivers_license.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e2de1e1a-3440-4ec5-8c28-47b39b1ba2f8/prisoner_b_3087_quotes_and_pages.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d657faee-1ca2-43db-bb2b-c3c5be29056c/how_to_put_batteries_in_black_diamond_headlamp.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7a05db2-6fb3-4a73-86ca-4bea1f912eb2/50616587826.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b6b28398-08e5-4fba-ab0e-c8064ae9a9e5/70122097940.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a5546437-acb9-4e49-999c-5285ccfa473f/history_of_the_single_wing_offense.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dee5ab07-61d0-4cad-a0a5-698519e91951/31971589336.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010729.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10729	5120 bytes
SHA-256: `55d5b14a9bcceb8ddf9a73dc5c67e4022e833b13f59d2ad5df731cb63810f0a6`
`font_01_sfnt_off000118b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118B7	13624 bytes
SHA-256: `69f2f4a6eb97905215108c98ded97b7d843fb179beb42d0ab017b3648652bd2d`

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