Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3dd45313c1ca10…

MALICIOUS

PDF

75.6 KB Created: 2021-03-19 13:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aa03e61b4b9d33faa33e2796b65ab1bc SHA-1: 6f4782cd9067fdf331a63b48816d917df1292cbe SHA-256: 2b3dd45313c1ca10143abef7fe8102206637a74df4d2a8608a17843b71d53df9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://maypoin.ru/wix?keyword=736+area+code+in+usa', is likely used to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://maypoin.ru/wix?keyword=736+area+code+in+usa PDF link annotation
    • http://itdomen.fun/lista_tascon_2004dg3w5.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/76746940966g9z1h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_60547e974a89c.pdfIn PDF document text
    • http://dkmz1.club/sitibpas9b.pdfIn PDF document text
    • http://domutobol.22web.org/el_regreso_al_pais_de_las_sombras_largas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_60525c824c401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_6029dd533905b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_260712726a244e4db9e9bf77c87fa64c.pdf?index=trueIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_aac422ea88eb40e680c38d32d1784efc.pdf?index=trueIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_6b561c15e9764509b6f436bc1d69f6b8.pdf?index=trueIn PDF document text
    • http://gadivedu.rf.gd/99081404825.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_5e08c353c3b841698bdf1fa72a8be10c.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_05483fe2350e4cb7bfbb04a1dd8eeaae.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_0faac19b6772469cbefa321d1fbe5390.pdf?index=trueIn PDF document text
    • https://bb209e34-24c3-4901-88bd-c00af8cda710.filesusr.com/ugd/de6798_8d11c20d223248c19f0638db7326eca6.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_d81cfe44ecec42828eb28c7ecf1beb8e.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_061982bbefea4882891cad746ce066fb.pdf?index=trueIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_d99d49c7489d48b7a8536e410af6f207.pdf?index=trueIn PDF document text
    • https://28ae28a3-27cc-4d38-be83-0de1f6925f83.filesusr.com/ugd/454016_d03e7d6519204b84b925d3b5e68e67e2.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_ca36e87b07144726a51612797b312574.pdf?index=trueIn PDF document text
    • http://tiwogiponifi.rf.gd/cadila_healthcare_annual_report_2012-_13.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_78e7d62b09394499b5c287b91a89feaa.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 5204 bytes
SHA-256: 734f4ac482bd40281f1e079effbde14e1382db3cb81fc6105514c9b56be8258f
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 11008 bytes
SHA-256: 8aa930d6bcc36f8aafb4723bf16b20c669a62dda147ad7510c3e8d37e084df70