Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc2101946e4c8c9…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 22:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd4a07d2846f99a5a3468649037327bd SHA-1: 8eaee4be750c998e6e939123f2c2dbceb0a4c7be SHA-256: 5cc2101946e4c8c94de9094889d1e7cf7d11451b0c9ce531ca3b7ebbcb78d66c
186 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to manipulate search engine results or 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 0.9990

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://dugedepap.ru/strik?utm_term=honda+mower+hrx217hya+price PDF link annotation
    • https://cdn.sqhk.co/sovixojer/i7YAahb/forgotten_tales_day_of_the_dead_solitaire.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/Wt7jfhd/cinematic_sound_effects_library_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/Y83Kqx9/maze_runner_2018_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/eb8Eggn/my_mobile_radar_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bimowikosaru/mjeOr5g/fios_tv_one_customer_service_number.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/bhcidCP/cube_animal_crossing_pocket_camp_gift_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mekewufi/Wgc0Miu/lens_flare_after_effects_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_6041c1824a027.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/jgjjcjh/cars_movie_soundtrack_route_66.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/Xnggphc/gorunetodozajuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/icnjdjf/components_of_strategic_management_process.pdfIn PDF document text
    • https://zofafekolabu.weebly.com/uploads/1/3/5/3/135301669/548629.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/2FOghow/32571775737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5fedc69a25023.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/b9eaafa69fed.pdfIn PDF document text
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/27df3ffe2d4b.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/higfhjQ/xukenusetitafu.pdfIn PDF document text
    • https://zunimivivonuz.weebly.com/uploads/1/3/4/0/134017399/9475176.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/9609061.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/i8gfjhb/mafijezapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5fdd5bfccbafb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xunilukegez/65384479268.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/resiwamojilowarewijepu.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/83112270876.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/lonely_planet_iceland_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 5300 bytes
SHA-256: 71afbe929d66eb7996369dad2ab5b3c8cbdb601be1d26f94f828bb33fc1a574e
font_01_sfnt_off00010962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 10992 bytes
SHA-256: 8b6f72140c681b2edc28709355a0edf1a63b4436d66bba2758b2c65b337da61b
font_02_sfnt_off00012eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333