Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4cc22e01d4613a…

MALICIOUS

PDF

108.5 KB Created: 2021-03-08 00:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e13a3bfe606870536cbfb70c8015b261 SHA-1: daa1eb69d2f183b09d33bd3f97cc12e246464040 SHA-256: fd4cc22e01d4613a9b7b36351bf24e1e373db4206e3f2f1e9fc5040d662f90a4
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of links, many of which point to disposable domains and redirectors, indicating a link farm designed to obscure malicious destinations. The primary malicious URL identified is https://dafemum.ru/strik?utm_term=d+link+dir+825+firmware+update+download, which is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly support the malicious verdict, suggesting the document exploits PDF vulnerabilities to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=d+link+dir+825+firmware+update+download In PDF document text
    • http://naturfresh.space/51020329070oi8mx.pdfIn PDF document text
    • http://mylevel.store/sotumuvinobatinapesinhwdml.pdfIn PDF document text
    • http://garantiya62.ru/craftsman_router_and_router_table_combo_lowes1f6gp.pdfIn PDF document text
    • http://cabinetsop.xyz/how_to_check_manufacture_date_of_glockyjarv.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/how_to_reset_my_samsung_water_filter.pdfIn PDF document text
    • http://ejqy.com/calendario_escolar_cantabria_2020_a_2020q956o.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/87966925202.pdfIn PDF document text
    • http://misirabul.22web.org/what_is_the_cheapest_roomba.pdfIn PDF document text
    • https://wapixanap.weebly.com/uploads/1/3/1/1/131164574/gusebefinu.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/dua_istikhara_arabic_urdu_translation.pdfIn PDF document text
    • https://lafimidoxugimu.weebly.com/uploads/1/3/4/5/134505664/suvonokowugazu.pdfIn PDF document text
    • https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/bowirovimoz_denulivixivona_mewubigesupafax.pdfIn PDF document text
    • http://#{HOST}/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disidigepaxu.rf.gd/dear_comrade_movie_in_tamil_isaimini.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_62bcd46d6b41416faf3f0a480f132e98.pdf?index=trueIn PDF document text
    • http://fozosoripivo.epizy.com/io_e_te_niccol_ammaniti.pdfIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_3ea6a19f3e95444b907d65987b3935a3.pdf?index=trueIn PDF document text
    • http://latosenepodukum.rf.gd/zojax.pdfIn PDF document text
    • http://fatafebegit.epizy.com/57049219483.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_f3186cf00c3348e6867a221a31d3a3b8.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_1f202ce45e6b4ffd85bacdba9f20e73d.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_787798a1602d46a58ed7323a1f7c80c5.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_b4021821f21448358a263bd7888280bf.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_off000159fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FB 5616 bytes
SHA-256: 0e699b60a9acbacb1adf15812210b3f8619d5c76dee8f7facd6c5e1fc7ca073f
font_01_sfnt_off00016d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1D 17820 bytes
SHA-256: 0e9d5996b215eac5619706aef1314a38f0dc188c3ce346bf084d35fc830a5497

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