Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a10b9cb722ce1b5…

MALICIOUS

PDF

47.2 KB Created: 2020-10-24 10:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2de098c1257725f76ce3b7ad37772f6c SHA-1: 3d812af58bb79e803be5877524140927de4d1175 SHA-256: 8a10b9cb722ce1b51e24a1a30a02a8f2f4ecb524da85caa656be24c945bc540a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are part of a link farm, indicating a redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to tax instructions, likely serving as a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=2020+virginia+nonresident+income+tax+return+instructions In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/xugeneragejijeb-mawusefafuwu-jukuxowuzopi.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/2620790.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/fisup.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/d66635d9d2.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/zofotinuvamoso.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/decaa6f6.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/taginex_jenawu_daforupobojifut_riwawiruge.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://kisigitoteke.weebly.com/uploads/1/3/3/9/133997396/gejexidotim-sulotug-pezelidulawaza.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/3425796.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/luxelula/xoxadidusolevir.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/cbse_exam_date_2019_class_10_time_table.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/algebra_1_common_core_15th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/cloud_computing_security_risk_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6892/0486/files/27814177258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/zutovebekuxojep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2246/2371/files/gowopefuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/13562206117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/kingroot_v4.5.6_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7111/8746/files/36996371249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/audio_manager_old_version_apk_free_download.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_off00007503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5536 bytes
SHA-256: fab51be15ba09b2bdea5dd457152d1f527d9aa04adbdeda31a1c547b114a2c7d
font_01_sfnt_off000087ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 10924 bytes
SHA-256: 0e6db572a7b36384a723198fe14b3fb17f565b9e932950a27f74fbf38ca5d6c3

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