Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e41d2d773c58be6…

MALICIOUS

PDF

123.6 KB Created: 2021-01-12 13:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 59c75cd9010b02485722071a85798cf1 SHA-1: e7b4735ac8c9a284b7b0ccb839b45aad5ad81645 SHA-256: 2e41d2d773c58be6fb7dc697a0909afa0b79447edd3f28ee98d0ab0b0a7cd256
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several identified as malicious redirectors or part of a link farm. The ClamAV detection and ML classifier also indicate malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or SEO manipulation scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=darkness+rises+android+wiki In PDF document text
    • https://worejefaluki.weebly.com/uploads/1/3/4/4/134456715/4fe71.pdfIn PDF document text
    • https://cdn.sqhk.co/sikereri/jibrgeU/thorax_medical_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/sexubozadifa/Wt7if4O/quizlet_us_history_unit_1_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/hhhbgjn/21285457464.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/ehaKlQy/breeding_calculator_dragon_city_ancient_world.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/jZggX62/diced_green_chiles_heb.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/zedozimosat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/besoin_en_fond_de_roulement.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/foundations_of_education_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/importance_of_theological_education.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/pip_assessment_criteria.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 33780 bytes
SHA-256: a5bad59ac05e37c57fc4e1a7a0f643abde0c9aa730963459b1fc195e48c12d6d
font_01_sfnt_off00017f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F1D 4944 bytes
SHA-256: 92efa7b0e41cf40f6b2309b8448d6ec1cc897b2f30f54d54a38d7a236af8e06b
font_02_sfnt_off0001900a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1900A 5816 bytes
SHA-256: 3241625a04f269f682f994b45b815b5e1d177e7e4dedf4df1af08199bdb13f0d
font_03_sfnt_off00019ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EAD 13156 bytes
SHA-256: df35c8b8425bba211c5d153741659ec43089af53c1887a7cadc1fcfd2befae72
font_04_sfnt_off0001ca50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA50 16404 bytes
SHA-256: eeddbfe6414c3d28b77c851d71493bff54de9a7bc0a605181748e70b61f3c29e

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