Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92b56af31f80baa…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 05:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa1661e7a080742bcc9e6572c9c8a042 SHA-1: 57af57afa97be2688f90078c6ecd7370b2b7f4fd SHA-256: e92b56af31f80baa27204eaf76658bdb723b9c8bf3a784f8c9f17bde3a728d8a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://nipisod.ru/123?utm_term=aplikasi+convert+pdf+ke+word+android', and a secondary URL, 'http://lightly.store/67342183023mo32n.pdf', are flagged as suspicious. The 'SE_CLOUD_DOC_LURE' heuristic indicates the document impersonates a cloud service to trick users into accessing content. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://nipisod.ru/123?utm_term=aplikasi+convert+pdf+ke+word+android
    • http://lightly.store/67342183023mo32n.pdf
    • https://cdn.sqhk.co/bomunerafoju/tCUFhbw/25388037260.pdf
    • https://cdn.sqhk.co/julukimesof/rfVhcic/10313455323.pdf
    • http://zaxiluxedexu.getenjoyment.net/what_song_is_playing_when_damon_and_elena_dance.pdf
    • https://cdn.sqhk.co/fadejiweruw/haieZjh/19625263114.pdf
    • http://procripton.com/46604904762odwad.pdf
    • https://cdn.sqhk.co/pumevigatare/jlKqNgc/hollywood_female_action_movies_list_2019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_bba8e6dbd73d448dbfd3874bd0525b5d.pdf?index=true
    • http://pesetunal.onlinewebshop.net/who_controls_the_wealth.pdf
    • http://pepudujer.epizy.com/26652896206.pdf
    • http://pojotew.epizy.com/homophones_worksheets_1st_grade.pdf
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_7120c36481084bb991f7b2a23706d3c6.pdf?index=true
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_ac9c266fbd6a48c8976297ca8d13f1bc.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_c4dca27d635b47db8c4132b35c04771f.pdf?index=true
    • http://najefitisefema.epizy.com/89657243681.pdf
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_1627f7e1cd82466ea0509c8bcbe34424.pdf?index=true
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_1d226aae413440e7af6a1af911e8b20f.pdf?index=true
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_10a1074046cb42e4bf4e0aa8b7b258ab.pdf?index=true
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_d1bf386228d045c0b766c5c963d5e442.pdf?index=true
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_42b006247c804da199731702e53d3baa.pdf?index=true
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_3aa6ec6fc30f4f2ebfceb2824e6053b8.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef75.bin
738344fbf8761fc43e6317a616137d790137cc1209f234c3fcaefae7f4908221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 5352 bytes
font_01_sfnt_off000101d2.bin
f5ae5db61e3666e18efac88f39aacfd4e36a64312f7a88eb622637c1da7401fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D2 11756 bytes

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