Malicious PDF — malware analysis report

Static analysis result for SHA-256 502dbcf1f88ab61f…

MALICIOUS

PDF

98.5 KB Created: 2021-03-30 10:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e3b5855ae17300824c1f7f14268200ad SHA-1: 508510fe21657433e5712f140cbe2ee475b4ccd2 SHA-256: 502dbcf1f88ab61ff115bf30d902742ff8ceabca8278122e94e8440e5f4ebb0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/award?keyword=the+satanic+bible+malayalam+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386593/normal_60067ebf4784a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_604f128089f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_6029daf38f606.pdfIn PDF document text
    • http://bawawurojetuve.22web.org/55441819588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487007/normal_601da838b667b.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/31e52ad6-916a-428a-9e89-54ea12a54907/how_to_add_fractions_with_mixed_numbers_and_different_denominators.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_e8f98b39ebd34ca186bf070729da5f7d.pdf?index=trueIn PDF document text
    • http://xidomuxi.rf.gd/advanced_analytics_with_spark_2nd_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/re_zero_light_novel_volume_10_download.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_9ff39de02d654a609d3b71e5e0a08722.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df89526-290c-4ec8-aaa7-4a9cf6ca26ef/marketing_plan_2021_sample.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_eb49e71aa4d84884a8f8b742f91fa398.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/fuzexiba.pdfIn PDF document text
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_b59069aaafba455bae0f395df23787b9.pdf?index=trueIn PDF document text
    • http://ruwitubis.rf.gd/oxford_learner_s_thesaurus_download.pdfIn PDF document text
    • http://mogivinisisa.epizy.com/benim_hocam_tarih_deneme.pdfIn PDF document text
    • http://vowefaxi.epizy.com/how_to_clean_thermador_grates.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/chupke_se_saathiya_songs._pk.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_9e45fd1a050644efb3ab87d7e32015f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2da8940-62fe-49f5-a3b5-b806e008f83b/how_much_money_do_private_investigators_make_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45072b35-495d-4663-a48c-25f9ae8ca740/how_long_do_you_cook_chilli_in_the_crock_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/straighterline_psychology_final_exam_answers.pdfIn PDF document text
    • http://merojupamen.epizy.com/85114795822.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_off0001438f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438F 5488 bytes
SHA-256: c57737280c3b128ecc9c97924cf77a86c78b3792b62a94eacf59878aab907d11
font_01_sfnt_off00015619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15619 11260 bytes
SHA-256: 3426f4acbb15308b04e8cc997ae7edcc461ab3d542eb04a7a5be7a0104daf18c