Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8840feebc2fa43…

MALICIOUS

PDF

73.5 KB Created: 2021-04-10 12:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6378c851ef575224cfd5a148c0deb9fd SHA-1: 7ec9fd30557b0e02897bab71f80515bd226d1166 SHA-256: 7a8840feebc2fa43ad404b28b0de9d70a29c4eaf7c015b1e1e7d2208ef92d37d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=powerbeats+2+wireless+reset
    • http://gamukanemafutu.mywebcommunity.org/xenogenesis_octavia_butler.pdf
    • https://gezedasi.weebly.com/uploads/1/3/1/3/131378850/7800667.pdf
    • http://likedizar.medianewsonline.com/axis_bank_net_banking_application_form.pdf
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/6323072.pdf
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/1806676.pdf
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/bddb45ca6a1095.pdf
    • http://terugesit.iblogger.org/important_dates_of_the_year_download.pdf
    • http://sujimelowakolop.medianewsonline.com/carcinoma_epidermoide_de_boca.pdf
    • http://woxijakuzadajew.getenjoyment.net/bwssb_notification.pdf
    • http://zomaragexavope.sportsontheweb.net/asterix_legionario_italiano.pdf
    • https://tokitojunetibot.weebly.com/uploads/1/3/4/2/134265352/lifotunujakazota.pdf
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/b16b2.pdf
    • https://zububeto.weebly.com/uploads/1/3/6/0/136082076/juzowutodipu-gawukukefex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://povusesa.rf.gd/landing_page_free_template_psd.pdf
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_54732e155314470592644122babf0ddb.pdf?index=true
    • http://nojikigor.myartsonline.com/kofexamil.pdf
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_e1ddbf786a9e47a49a62b7ba54e86fcc.pdf?index=true
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_871fe4a6ac54493d98d587bd49d0e285.pdf?index=true
    • http://tuwemipidepu.epizy.com/give_in_phrasal_verb_meaning_in_malayalam.pdf
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_e0879a4bb88d44a0afd76cbeae2e5ca3.pdf?index=true
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_1a00b3907293467588550afad09a1eac.pdf?index=true
    • http://dumizalu.epizy.com/18091933056.pdf
    • 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_off0000e140.bin
9141a7726b79019dc6adcd26c9b8ebe5450746fb3e60b35f7706a1e205999cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 5044 bytes
font_01_sfnt_off0000f283.bin
a14ede1788184435e5df001922f87bf6e6cf5d72f5cdd8753d8cfa8162cb206b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 10732 bytes

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