PDF malware analysis — malicious · a44e34b636f2e374

MALICIOUS

PDF

89.6 KB Created: 2021-03-27 23:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: b6bce25cbb448ce9debf1da67b6a65ec SHA-1: decbdd5596827b3a75a52d752e0ed639742f4ae6 SHA-256: a44e34b636f2e37408f042877d4291d71d7c0e2d18cb8806735aabc43c77faf0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://bologen.ru/award?keyword=california+all+purpose+acknowledgment+form+pdf PDF link annotation
- http://itabody.space/vaxutadatibuzi1p50x.pdfIn PDF document text
- http://copyrightnotices-form.com/misixuxulanislfdum.pdfIn PDF document text
- http://alesyasemiletova.com/vemadua3glq.pdfIn PDF document text
- http://mif-smeh.space/46882983699in3ks.pdfIn PDF document text
- http://politach.com/lamutaginesosovaroelh8s.pdfIn PDF document text
- http://likelid.xyz/453893385977msa4.pdfIn PDF document text
- http://karma-911.com/fobigotosivulavoku4qv9i.pdfIn PDF document text
- http://trenolgia.buzz/35047509576f650w.pdfIn PDF document text
- http://znohist.site/tisegujakolumujiq52.pdfIn PDF document text
- http://epipog.com/12083831304712qo.pdfIn PDF document text
- http://appless.space/what_is_harry_potter_book_1_aboutc3te4.pdfIn PDF document text
- http://hookup753.fun/resumen_de_12_cuentos_peregrinos_me_alquilo_para_soar93g1t.pdfIn PDF document text
- http://optalpha.com/41725719049d9w65.pdfIn PDF document text
- http://eduha.online/why_does_my_dodge_avenger_battery_keep_dying07ffr.pdfIn PDF document text
- http://tesocoin.online/mn_dmv_drivers_license_manual134vf.pdfIn PDF document text
- http://farvestnn.ru/american_standard_hvac_model_number_search3izvr.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/xalasawu/business_letterhead_template_word_2010.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fd0ce96d-954b-481d-a68f-dd74d508c466/personal_exercise_plan_template.pdfIn PDF document text
- https://s3.amazonaws.com/xupizewuxere/56693992046.pdfIn PDF document text
- https://s3.amazonaws.com/wajufifenoxuj/barangay_clearance_application_form.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d815a43-e1dd-4a19-8e74-1b729dd583bc/what_type_of_oil_does_a_2010_dodge_grand_caravan_take.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e91ec88f-78a3-4513-9122-96f2ef83e40d/mechanical_design_analysis_engineer_jobs_in_pune.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/185b1f84-6d9c-4a56-badd-785efc7950bf/gopuwogiwisufiwokuvina.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c040571-2a74-4649-9ab2-5b51bc92ff05/lava_8008_hd_antenna.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_off000106fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106FC	5536 bytes
SHA-256: `57b36a9e91ba8fac5b7a00315733e83d3d563d1ab57b0b80eb2220ff3f6578d0`
`font_01_sfnt_off000119d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119D3	12128 bytes
SHA-256: `4d3d06771b563802765cfbb359d3eb6cb450d228e1cffd9213b896e67d45b228`
`font_02_sfnt_off000142e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142E6	16140 bytes
SHA-256: `5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c`

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