Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9cb83729735051…

MALICIOUS

PDF

73.0 KB Created: 2021-03-09 12:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b875a12004656b6b733e38a09f4d862f SHA-1: 2a16d1039fe23737fa1210aeddd3944853fd9b24 SHA-256: fa9cb83729735051e03ac4d0af45c0604ced310d303ef026a2a55397de1c747f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains keywords related to car sales, likely serving as a lure to drive traffic to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=lamborghini+gallardo+manual+for+sale+australia PDF link annotation
    • http://gupirigugorixuf.sportsontheweb.net/how_to_read_fingerstyle_guitar_notes.pdfIn PDF document text
    • http://vuxokiwi.22web.org/jitaxazazerijolupuwepob.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/doliwasenuxik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/af016a52-9d50-48f6-9188-25675f3e2d8a/98691866837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fa936a-d118-4330-b9b9-6526593bbd65/25226888723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2108e43f-80b9-4e42-b8c1-df27d305e7ec/kodezunelanirexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2aac27-b481-431d-bb9e-2314d9467849/club_car_precedent_seats.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_dd5a30804cdb48028a2ab953a6d5f650.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04ccc12-e82c-4ecf-b450-f5bd59776a48/22026558402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7dc6708-c24a-4222-9ae0-4e7e70449a12/11498849732.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_e8e07ae9d6e947168a4be562e293da1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafc0d81-0c45-42d8-951a-638edd4a2f36/92436272628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22b8efb-e087-4e6e-8b50-62ef48bdcc1b/garuwewuxepilonir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46395d23-2e93-4ec1-a55f-7cd174169813/code_of_points_rhythmic_gymnastics_2017.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_7b2d1de8ca5a4d849218a59815200dfd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc03a3a-201c-4e55-abfb-19d9db78fb39/wamawixojafazamazotut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614cd413-7ed4-4c16-9304-fabdab18c724/self_portrait_photography_tutorial.pdfIn PDF document text
    • http://nofulevar.epizy.com/lufilajisepizumadanuleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2450ac-e09e-44f5-9d8e-47b214a16d35/amelia_bedelia_chapter_books_online.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_88af2594cdc44815922c045f97ae3543.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 5284 bytes
SHA-256: e9ff8244e10c93bbe6deaef6c8b900e9c48e38ab0e13a70142855e1e6a37eb4c
font_01_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 10444 bytes
SHA-256: 3b1e8657efe5a95d50289d01913019c45efc6f211e37d4cc8c0c124d3b281ded
font_02_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.