Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d4848845f49409…

MALICIOUS

PDF

72.5 KB Created: 2021-05-03 10:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b647b1db7e2b1b57569785eedf7e0b SHA-1: 293c444885c337ffe555dae9b80442033a1f3fb7 SHA-256: d8d4848845f4940946bec3b19467d118628e3cb08bbfec82812d9bd0fa128ada
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is designed to direct users to a variety of potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the presence of numerous external URLs points to a common tactic of distributing malicious content or harvesting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=2005+cts+value
    • https://cdn.sqhk.co/gefimiwotux/Alghi3v/check_lotto_scratchers_online_texas.pdf
    • https://cdn.sqhk.co/juxerawabuf/SiTFibm/country_music_awards_2020_tickets.pdf
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/7766246.pdf
    • https://bokepamukabina.weebly.com/uploads/1/3/5/2/135293240/weget-lovizixerogol.pdf
    • https://gogozofoful.weebly.com/uploads/1/3/4/5/134512065/xibaxupax.pdf
    • http://novedexezenel.66ghz.com/68431628321.pdf
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/aea0e4c61c5.pdf
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/sipedulugew.pdf
    • https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/85724ca491.pdf
    • http://kaforij.22web.org/pdf_adobe_reader_9_free_download.pdf
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/3774b.pdf
    • https://cdn.sqhk.co/fedugaxoloz/ibwifSI/zaposodetilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b2e7bd56-60b5-4b23-8865-086419400a45/writings_on_the_wall_piano_tutorial.pdf
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_b589ecf1addf4dc093b93310d983ecf8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff877fc4-7bcb-416a-8fae-4c16498e9021/belufojetuxavugonapek.pdf
    • https://uploads.strikinglycdn.com/files/56144116-34e6-42c0-a084-74eb203bdb9e/padukoku.pdf
    • https://50e0a74f-e7a5-4ac3-a7a6-4cdd7b1ad00e.filesusr.com/ugd/8a9d9f_3f0850fef4b54938b48dd56b04f7b782.pdf?index=true
    • https://uploads.strikinglycdn.com/files/efb6caae-97d4-4640-86b9-12cae1fb5b51/america_is_not_the_greatest_country_essay.pdf
    • http://bajipelorisu.rf.gd/highway_to_heaven_nct_piano_sheet_music.pdf
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_95d6f8b049e345edb786f3a8814fb287.pdf?index=true
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_7839933e04ff4644a66087373d6912b9.pdf?index=true
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_1b776199adb24611b0f816512aa6ac02.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_off0000df82.bin
3419ce3609f58c1f904e167a5a7f18c9740bea686e38b74ecae4ae3480c9868a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 5060 bytes
font_01_sfnt_off0000f0d5.bin
8ea965355b7c854c3b79b22b901b46c5cfc128a1b4707f81d3cb236709c2d2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 10448 bytes

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