Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d85853d4827fe5…

MALICIOUS

PDF

75.9 KB Created: 2021-04-18 09:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59a0ba43e7f77fbed1f68e0947566e97 SHA-1: 6c3adbc0e330a97288901708fc0d29c612960f75 SHA-256: 42d85853d4827fe5305bcd85eba7efeb627a91b71fd78f3ebfb8eceb3631fe33
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a site that appears to be part of a link farm designed to attract traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://kuzutuzo.ru/strik?utm_term=singer+4423+review+uk
    • http://kumaboperituf.22web.org/14409456963.pdf
    • http://fuzirirofo.iblogger.org/format_date_in_crystal_report_8._5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zusevamasor/bigger_leaner_stronger_food_plan.pdf
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_47ba95a9c59c4adeb8d76d34fbd8d31b.pdf?index=true
    • http://puravusixatix.epizy.com/xurojuja.pdf
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_94d0113d4fe24bb6bcf4e7d2776ef416.pdf?index=true
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_065d857be31f41bcaec8b77431faa06a.pdf?index=true
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_a75d71f58b0f49ffbd4a405ce7f4073f.pdf?index=true
    • http://watenumedar.rf.gd/buwolufadexe.pdf
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_9c76777f2e874188bcbde9c49a9ccf07.pdf?index=true
    • https://uploads.strikinglycdn.com/files/167b6798-69a9-4961-8608-4c5a9a81ad4f/muribupuvulusogo.pdf
    • https://dd91dc4b-d2fe-4aab-ab17-22023aa64d5b.filesusr.com/ugd/f05b1d_014ca443874d448a8eb8ab7b240dcaf4.pdf?index=true
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_0dff3a83ed604ffe8a6c0b25dcc9a8c8.pdf?index=true
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_82505107632e4a9fb719f9cf8cdd1925.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7bd2153d-a7ba-45fe-bcf3-4e39ccc309ff/wibedokafazuwowudimipura.pdf
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_3a189278576f46d3b305ee5d4a1f8db3.pdf?index=true
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_63b3d5de8dba4aaab06c365c0985a7c2.pdf?index=true
    • https://s3.amazonaws.com/fukezavazuj/31096265552.pdf
    • https://uploads.strikinglycdn.com/files/6f34ecff-3612-4611-a42a-091d847ae1c3/what_is_a_wake_when_someone_dies.pdf
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_0c2b64a8a21c4f06ac1b0f22439459ce.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_off0000ede1.bin
583fa99a5e8609ad517e8c6b617a543db9c1f2a068a9da7175c60f18fe4b93c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5136 bytes
font_01_sfnt_off0000ff98.bin
eb45088ca48deb0ddaf60d76eb5bd603e508e2ecf78a1a09c787c3f153748969		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 10256 bytes

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