Malicious PDF — malware analysis report

Static analysis result for SHA-256 285274a66f99bd54…

MALICIOUS

PDF

64.0 KB Created: 2021-02-07 07:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1d475b662d0ffaec4344d7cb10f89d5c SHA-1: bff424ede7bd302f319c978c94c5fd7395fb20df SHA-256: 285274a66f99bd54bdacd649989937dd39540795aeef42d7ee0615d5b365523c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'utm_term' parameter in one URL points to 'netflix en op macbook air', indicating a lure to attract users interested in Netflix promotions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=netflix+en+op+macbook+air PDF link annotation
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/5949159.pdfIn PDF document text
    • https://wejuwano.weebly.com/uploads/1/3/1/1/131163718/ec34e1.pdfIn PDF document text
    • http://titoto.xyz/wokaziririrejixreusx.pdfIn PDF document text
    • http://organicnu.info/fichas_de_consejo_tecnicojfh34.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/2802354.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/txicjgQ/safogutivevunajudurilus.pdfIn PDF document text
    • https://fegojobakib.weebly.com/uploads/1/3/1/1/131163858/zimapeda_daxazofepemuzu_lifizutenunaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_6005a0ceb7bc1.pdfIn PDF document text
    • http://lnstagram-helping.live/wuzevagapidoto47q55.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/0ee6e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5fd3820860bd8.pdfIn PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/9561620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5fc5f295491cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387571/normal_60066e48c3a1d.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/zutabejuviwipiguzan.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/silenapeladug_natawisofa_papegi_gedawirubi.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/2168816.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vukilef.rf.gd/tales_of_vesperia_walkthrough.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08F 5224 bytes
SHA-256: c10e205f178500e80625c792afd345d288b10f9740c3dacd25f857dfa63ff041
font_01_sfnt_off0000d24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24B 9632 bytes
SHA-256: 7d47b614ae9812d4a48dd95d6f592061812251287bfc2ee5e4443a525a8b9b6c

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