Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1e96434f302027…

MALICIOUS

PDF

84.7 KB Created: 2021-04-30 00:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46355a90a8cbbe65418b3194925ff093 SHA-1: 4334cdb49529b724c629edfb228240440cee0e9e SHA-256: 9a1e96434f302027c5fb8a7eb7a6aac5f808b085be7dbbcd9f24d318685cf779
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=1997+polaris+scrambler+400+specs PDF link annotation
    • https://cdn.sqhk.co/fixijolexap/hhADGgd/rigugefodonomopaxujutatax.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/1hdxhg8/dobexuxoxagunirikarakafa.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/WjgChjd/blank_calendar_format.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/haii1fq/kick_the_buddy_2_apk_download.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/153204df7.pdfIn PDF document text
    • https://bopazexujow.weebly.com/uploads/1/3/4/8/134876268/kidoduruf_zujosuxasilese_dojikadi_vadejazimomosus.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/8011211.pdfIn PDF document text
    • http://xelinuruziv.iblogger.org/45118101974.pdfIn PDF document text
    • http://myirn.icu/samsung_q7_49_specspd307.pdfIn PDF document text
    • https://xisifogobodi.weebly.com/uploads/1/3/4/7/134735845/miwabevotoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/PgcnLja/ninja_fruit_cutting_game_download.pdfIn PDF document text
    • http://italiahot.fun/wotesefuygmnk.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/vuliwisuwig/retinopatia_diabetica_clasificacion.pdfIn PDF document text
    • http://xasezujagabef.epizy.com/12229848674.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/pride_and_prejudice_movie_online_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/71715469337.pdfIn PDF document text
    • http://koxogulu.rf.gd/20281120977.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B09 5644 bytes
SHA-256: 462f8a80f26a91f230421365637f8803a5812be9adac61addbe1d1e045382130
font_01_sfnt_off00011e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 11656 bytes
SHA-256: c36ed897556e18923e64ed1c49b1f99b034d63ce574d493e0c93851846d59b1d

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