Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fa16797e269424…

MALICIOUS

PDF

85.9 KB Created: 2021-03-30 16:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 79ac5a76c8d5b8eed512928372517bc6 SHA-1: 2e4d0f9918bb609563896daf1ae7c46c0a5d59f5 SHA-256: 39fa16797e2694245624988ba484a1b2be74d7250e906f7e58051920ba8d0c48
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated or point to suspicious domains, indicating a potential link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://bologen.ru/strik?utm_term=how+to+crochet+a+dog+sweater+for+a+chihuahua PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5fcb338947a6f.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/e7d29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_5fea0b89491dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372073/normal_5ff78c18269f5.pdfIn PDF document text
    • http://zobosebavasagid.iblogger.org/sedentarismo_conceito.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/lobekez.pdfIn PDF document text
    • http://tupuved.iblogger.org/business_intelligence_analytics_and_data_science_free.pdfIn PDF document text
    • https://kotirilu.weebly.com/uploads/1/3/4/3/134332744/3764464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5ffab6fa80fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_603b147fcfdab.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/6373085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4c521d0da7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_603e0e65c1757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://loxosufodu.epizy.com/40077356540.pdfIn PDF document text
    • http://zilaguku.epizy.com/what_is_the_meaning_of_xanadu_in_kubla_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/matilda_roald_dahl_film_nederlands_gesproken.pdfIn PDF document text
    • http://zazasos.rf.gd/shanghai_fosun_pharmaceutical_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/nijituxajujeletakawuxuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/distance_and_displacement_practice_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/honda_gcv160_pressure_washer_engine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/archicad_21_studentenversion.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/adivasi_dance_information_in_marathi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 5080 bytes
SHA-256: 4be6f3fd11112a42eefc16a6b6dda9be9ec30d4e2178d9d6ecfd4cd13edd54ca
font_01_sfnt_off0001143b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 11024 bytes
SHA-256: 01f02ec7ce3037572c8424d062a6fc36d585cb8ab68bd97d9795f4bc70fc6bf1
font_02_sfnt_off000139af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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