Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2a4b2657bba14b…

MALICIOUS

PDF

50.0 KB Created: 2020-10-15 00:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ee8ab2ae6ec3dc8e76d51a554cdbd3ee SHA-1: 6541c4f094a371a62608003284dc79b8ef7d6b47 SHA-256: ef2a4b2657bba14b4d79ca505747669c25bba3e9f91317dd23af1b97de83a911
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one that redirects to known malicious infrastructure. The document body text and embedded links suggest a lure for users seeking an 'IPL team squad list PDF download', which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL confirms the intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=ipl+team+squad+2020+list+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f876fe64914f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f876e2c1a401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f877181bfc3b.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/rorame.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/9730997.pdfIn PDF document text
    • https://site-1043965.mozfiles.com/files/1043965/7036657007.pdfIn PDF document text
    • https://site-1044146.mozfiles.com/files/1044146/sovebezejuzumopaguwujatix.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/4499251.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/zadilamifokigisa.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/53e41d8972de40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebc3987-46fd-4246-9bd2-bb88916c888f/rasozebew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a37d3c-2778-4457-bf36-7a65ba7234b7/82529072362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f530d2a-4023-48a9-ae0e-afdb2a8d2e35/mekekivedidofukizakuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09f61b5-8ed7-444f-9d6d-c31d60ad8459/66266823870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1970269-7004-47da-9e9b-576fa7dcf9b6/putizojopaxiwinugufagag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dc6312-b82e-4356-b0f9-718b38d23285/51397361597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e28a401-e59b-4a2e-a48b-c018dd35c5d6/jofonafufo.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_off000085aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 5520 bytes
SHA-256: 74bbdef5576a2b6594fa418ef0e93f604bbcb74929d8d14c6938bf1f1c8ebfb3
font_01_sfnt_off00009869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 10044 bytes
SHA-256: 6170eb3540d5e7353166913b71980fcd41544cf1127acc8a5668ec3a819b34ac

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