Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60afb0e6a14c6f0…

MALICIOUS

PDF

70.7 KB Created: 2021-03-20 01:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6b1ab244254ad1a53d0bf01919522407 SHA-1: 51476ecd18fa48c9425649b38ed26fb7855eb208 SHA-256: f60afb0e6a14c6f027372ec7e55c9fc9f43863d3d92a3b95c0941c2d14e9a3b9
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The document body, though heavily obfuscated, suggests a lure related to 'realidades 1 capitulo 9b-3 answers', likely intended to drive traffic to malicious or phishing sites. The presence of multiple external links and the ML classifier's high confidence score indicate a deliberate attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://pelibifir.ru/wix?keyword=realidades+1+capitulo+9b-3+answers PDF link annotation
    • https://cdn.sqhk.co/najuvotuwoz/jdOx6GN/fasateruxuvezeruxozuv.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/5278319.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/AgdZwgc/health_and_safety_tips_during_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/tegimatararo/RjcfhMn/bafevujiwemidumamuladeni.pdfIn PDF document text
    • http://premiumpornclips.com/tesis_de_alcoholismo_en_adolescentes99idc.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/2670312.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/lemadebusas.pdfIn PDF document text
    • http://furniture21.online/how_to_make_money_in_stocks_a_winning_system_in_good_times_and_bad_reviewy81fk.pdfIn PDF document text
    • https://jipenudus.weebly.com/uploads/1/3/1/4/131406532/194544bb279.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/9f3938b66895.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/Iiajeha/surplus_tanks_for_sale_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jdIifLD/among_us_maker_skin_among_us_wallpapers.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/52bede28-0b4f-4dd6-bbfd-0cd04e446da5/renuluwu.pdfIn PDF document text
    • http://vanadokikepuf.rf.gd/panasonic_rice_cooker_spare_parts_hong_kong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523139af-7090-4e22-b425-9e4750874348/59880191957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ce850a-95ce-4633-bf68-204870184e2d/river_cave_bowling_green.pdfIn PDF document text
    • http://girupesoja.rf.gd/bollywood_movie_songs_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed88eab-2f67-48bd-b40c-0aff07a61209/walawibilenakabegigolej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4361ba13-327a-4469-b7bf-6de4ca328c50/richard_iii_of_england.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/jumululivug.pdfIn PDF document text
    • http://fexajorijoworas.epizy.com/autotune_5_dll_free.pdfIn PDF document text
    • http://dibiremiva.rf.gd/fovubafuzuginusadosozige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71b94bc-d2ed-495b-90fa-7cc1a350a41f/the_moral_of_the_story_an_introduction_to_ethics.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_off0000d5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5ED 5708 bytes
SHA-256: 8e50f2f5c99995a92f84880839fc570cf940a3f44afe7a84ba82dc72951118b8
font_01_sfnt_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 10544 bytes
SHA-256: 562bbff1a87e3858480fc2473c023908c7670bab3363e12c3da1ad5da88ba65b