Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae8752b81a78538…

MALICIOUS

PDF

95.8 KB Created: 2021-03-19 21:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8e9d5fc862d32cba3ff1c59cab1b67a8 SHA-1: 1550a2998ee63f73914cedcca86aa5c62dfc24c2 SHA-256: 2ae8752b81a785385817783e12e1c86d387703cde7aa8d5d5091184a37a13bfa
186 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 0.9996

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://vilenefex.ru/strik?utm_term=lg+v20+second+hand+price PDF link annotation
    • http://soluzixod.66ghz.com/culture_and_sensitivity_report_mic.pdfIn PDF document text
    • http://gixuloponij.mygamesonline.org/zugagadabufagamivolusi.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_32daf20a28d54d0c83473f598b0ece22.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff08237-f018-4518-8c42-096c1cc90eb6/fastway_e2_trunnion_hitch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b329e56f-6624-4f9c-a87b-294c3176aa98/39437335432.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/avatar_3d_apk.pdfIn PDF document text
    • http://tidejixegiseput.epizy.com/59568982085.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/89320272203.pdfIn PDF document text
    • http://xamazaxalezamat.rf.gd/mepaxajaniromaxedap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd48137-7f62-4a36-a466-c1dbd342da78/92606596434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed08188-a64b-4a24-82ba-4aca218780ce/cpi_intouch_package.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/2230021061.pdfIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_4154c4a87cac4994b77198418e5b1118.pdf?index=trueIn PDF document text
    • http://wugujub.onlinewebshop.net/how_to_apply_adhesive_vinyl_to_wood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96ad93f-8981-4900-b65f-4e009ba5d02c/jifefelosamofusuzaluwena.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_d6ae6bf6960544b9adee99efa48e5957.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_d55a9d2a419a47fca3ab3de2d1b51ac1.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_fa4b50c8a64746fcb024129d8724aa8b.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010624.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10624 16952 bytes
SHA-256: 72fe176565db7186bc1578c849837a4a46f8ab33b69aa2cfce1ea21168bd1a78
font_00_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 5576 bytes
SHA-256: db91ece74251db767604da5e0fa113ce917b853eb7f101a46ff743a751ab1633
font_02_sfnt_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 10856 bytes
SHA-256: dc7e5b1679d9d439c1998eeec8070007795e72422ffd01129d472f918ad41cab
font_03_sfnt_off00015a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A40 16216 bytes
SHA-256: bf13900e28cb1d1a335440cc7e9ee212d64002b8207505a2a5edc1e5590be4e6