Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5f836ff48205be…

MALICIOUS

PDF

71.7 KB Created: 2021-03-18 22:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7107ebdcac93d6d8a0f8e5a7068b6986 SHA-1: bb0aa5928de7fcb1e035476b6749c8d813261498 SHA-256: bd5f836ff48205be69a45f8be3d056d52262406b7c0c36f30093d0221b0c1986
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a larger malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=amarillo+by+morning+chords+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453532/normal_601df9662f423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_603541bd3db5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470698/normal_60041870b2a93.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/hf1B1hh/final_fantasy_xv_pocket_edition_review_ign.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_604fa32e69106.pdfIn PDF document text
    • http://tedamowajowiw.22web.org/template_arborescence_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_600578ca4ea12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ffaed11707f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5ff88ed45cdef.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ihUenjf/crazy_sausage_runner_recipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_43435bdabee7426ab9d34c07c071a464.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_a6ca3a25f10d498abd5b289ac0cb495b.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_f0be781849834ca9a380914b54e840fe.pdf?index=trueIn PDF document text
    • http://sufapanizesemot.epizy.com/chlor_clean_wipes_safety_data_sheet.pdfIn PDF document text
    • http://majerowi.epizy.com/78206172958.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_41520cdf3f66492d9b1d5a40965ec1c4.pdf?index=trueIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_c47bb1bf1c524793a4d3f67db03127c6.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_5459486027ec42a4a002c8f09fa58fef.pdf?index=trueIn PDF document text
    • http://variwan.epizy.com/tijoretolupamumexesul.pdfIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_53aa2aa331484affbb757f8a8004538f.pdf?index=trueIn PDF document text
    • http://toxuwinib.epizy.com/caucasian_chalk_circle_summary_notes.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_8461ce13541746289004ca2dfcaf5ae2.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_off0000daa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA0 5800 bytes
SHA-256: 792491bfad777416b753205f89ccf617a5f20c1adc6de4100adbad7887dfe771
font_01_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 10276 bytes
SHA-256: ba90b18784e4dff84917b21ce0e7997e7ec38b696caedd1ce27c3c3f20221819