Malicious PDF — malware analysis report

Static analysis result for SHA-256 203ee27fd4075a1e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-25 06:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0f8b507b17bb3dd00d2f5aacc1f03ea8 SHA-1: acb40b3ad864990c5f946326c79ba9df2e616be1 SHA-256: 203ee27fd4075a1ec84e822523ff063394dc041f0a8b04aaa4a45be9597fd1df
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily corrupted, appears to be a lure related to 'how to increase height', directing users to external URLs like 'https://zajinet.ru/strik?utm_term=how+to+increase+height+1+inch+in+a+week'. No scripts were extracted, but the PDF structure and link farm heuristic indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=how+to+increase+height+1+inch+in+a+week PDF link annotation
    • https://fuluposusiziz.weebly.com/uploads/1/3/5/3/135321682/6774797.pdfIn PDF document text
    • https://favopitovuseb.weebly.com/uploads/1/3/4/4/134455409/a58231e8b9eae.pdfIn PDF document text
    • http://voiprormul.xyz/sakotegazezividapx90n9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5ff797616fafb.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/68359a3bb6.pdfIn PDF document text
    • http://sagokorize.22web.org/45445743085.pdfIn PDF document text
    • http://alluniversity.fun/gitetepebezolelofc323.pdfIn PDF document text
    • http://apkweb.net/who_is_thomas_twin_in_the_bibleu4kwc.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/2447370.pdfIn PDF document text
    • http://tehnotop.site/can_democracy_survive_global_capitalism52mq6.pdfIn PDF document text
    • https://ruzamugube.weebly.com/uploads/1/3/4/0/134040566/nelafawagosimawa.pdfIn PDF document text
    • http://triple-doska5.club/easy_payday_loans_online09gum.pdfIn PDF document text
    • http://newsportstechnology.ru/where_can_i_watch_big_little_lies_season_2_in_canadaqh8ve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450635/normal_6011e95379b88.pdfIn PDF document text
    • http://segway-wheelchair.ru/443717783270j83d.pdfIn PDF document text
    • http://myshoes.moscow/denididubixaburepezoxoc9k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_ee7a40952bf14b3fa2cdb2d29dadffae.pdf?index=trueIn PDF document text
    • http://baloxes.epizy.com/sovinuselumitanukoxobote.pdfIn PDF document text
    • http://zinebozozapi.rf.gd/samiran_das_all_baul_song.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_a68fe21a6d0545f5ba3873d9a3fefc67.pdf?index=trueIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_2786a7888edb41e591ccfe44dc27e9b7.pdf?index=trueIn PDF document text
    • http://jujewubimowe.rf.gd/verbal_ability_questions_and_answers_with_explanation.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_7fa6c96d46674673bf7c0c13b640aa5d.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_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 5196 bytes
SHA-256: 167f482aa3344423eceb644cc2347b6a0ad73470f58eef897418c2d02b520c84
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 10776 bytes
SHA-256: 530daf25d1a0c825e40f1b86cf3874f6dfdb8a448455ba68e7fd5a5ad3cc83de

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