Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ccf38c884a520c…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 11:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e148c2c5e4c0071bf2d1fcf557806c34 SHA-1: d83a118da004831e18ba28e404a10de1647669f5 SHA-256: 45ccf38c884a520c9ffd1ea06e5c11d135689f2f2bd17e899d7baf82fd5153f7
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update. ClamAV detection and ML classification further support its malicious nature. While no scripts were directly extracted, the overall structure and heuristics point towards a social engineering attack designed to compromise the user's system or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=blockchain+tutorial+for+beginners+java+ee
    • http://wijutomotagam.mypressonline.com/lewilunolijusosonow.pdf
    • http://instgramcopyrightdispute.com/79250394119devsy.pdf
    • http://gudokav.sportsontheweb.net/how_to_put_pictures_on_casio_fx_cg50.pdf
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5fe0d2b412156.pdf
    • https://cdn-cms.f-static.net/uploads/4476285/normal_600eb20ca5201.pdf
    • http://woxijakuzadajew.getenjoyment.net/93700335865.pdf
    • http://bitcoinlearningcentre.online/arduino_uno_wifi_datasheetnhigp.pdf
    • https://cdn-cms.f-static.net/uploads/4374199/normal_602a4855b2044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_9286b9b42dd8432b91111ef84a310dcc.pdf?index=true
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_d2d3ec4600bc47fa8b524128af9c2fe8.pdf?index=true
    • https://s3.amazonaws.com/kibavutibeved/77417212741.pdf
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_3546731bb0e14b6cb9c109b6d614060b.pdf?index=true
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_a67b252c56dc47dba1c9b51114e23d6c.pdf?index=true
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_9ae80e3bb2944bdd8e296ed19f685755.pdf?index=true
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_de9fc6a9b6f44ae08a20a49c2d95793b.pdf?index=true
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_2d646d0b431a4592971a4acee35c4705.pdf?index=true
    • https://s3.amazonaws.com/bogeguva/blu_ray_dvd_ripper.pdf
    • https://s3.amazonaws.com/nilafafakem/88785101915.pdf
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_5e074644584e470a8839dd06c1e0313f.pdf?index=true
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_dda702c1a0ea4bbaa5d1b4f727e55d77.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_off0000f0a7.bin
628db62949b7e3f4892bf7c60731021d2b3a8524b190da700e59cecb107b6dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 5532 bytes
font_01_sfnt_off00010388.bin
72345d77bea6df2d37e352c6e076f274cf0aa5a120b9837c2fe74e54a18cc1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 11628 bytes

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