Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5f973a599d18aa…

MALICIOUS

PDF

90.8 KB Created: 2021-05-31 15:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 498b085a1fe6f8f1fac2a2c7f2ad04ff SHA-1: eac3fe083baf490b44a4b1c9f5fdca4ab715331c SHA-256: ec5f973a599d18aaeda4a636ff7ec10e29dcd1722ce0e9eb3cb2beb42b9eb749
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9980

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://chcial.ru/pbw?utm_term=hareketli+s%25C3%25B6zs%25C3%25BCz+fon+m%25C3%25BCzikleri+mp3+indir PDF link annotation
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/7406156.pdfIn PDF document text
    • https://jiwonilasipa.weebly.com/uploads/1/3/4/3/134313366/1787407.pdfIn PDF document text
    • https://dogopakuva.weebly.com/uploads/1/3/4/6/134698139/a8b66956ad9f51.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/pawobetaso_kuvagixezopu.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/sosiliwun-dututawofonaraj-nabifomiguj.pdfIn PDF document text
    • https://kotemuzever.weebly.com/uploads/1/3/4/8/134884044/116523.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/2385548.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/zagabeg_dopiwabizelo_vijirixa_sezoniz.pdfIn PDF document text
    • https://birebojutadavom.weebly.com/uploads/1/3/4/3/134342015/subakizovusojuganesa.pdfIn PDF document text
    • https://zidajikivumab.weebly.com/uploads/1/3/4/6/134625594/7911906.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/620e65177.pdfIn PDF document text
    • https://rulewosiziruzo.weebly.com/uploads/1/3/0/7/130739522/walisafuwomu.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/6045f1b9123ee.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/manowaw.pdfIn PDF document text
    • https://mevusaku.weebly.com/uploads/1/3/4/7/134721943/kedixadomop.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/momefa.pdfIn PDF document text
    • https://jagakipu.weebly.com/uploads/1/3/7/4/137498766/6726859.pdfIn PDF document text
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/lepavug-xutapibuposedig-lupoxesol.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/1c7eca9f-8683-44b4-891d-2bc636662aa5/extra_stoichiometry_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bc845f-88a3-4c05-97ed-41275475dffc/dakotifaweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fe408e-39a6-4210-a75e-ccaba01fa2c9/laxupejoxokojonalenot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e57748c-986f-4530-9247-019f435ea754/jumunelenerexus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79cdbec9-49d9-4485-8e7c-723eb65f9662/harley_breakout_maintenance_schedule.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 5684 bytes
SHA-256: bec1839bdeba04c0022c5f63a1b2b1f88d06967de6345b056338320f7aac5693
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 2140 bytes
SHA-256: 3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4
font_02_sfnt_off00010417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 13020 bytes
SHA-256: 325cd8979011ace3e146dbef4be307ad6253c74f98a6451b61c85d6d5edab1cf
font_03_sfnt_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 16428 bytes
SHA-256: 35a81d906c578f177cc2a777e0ce631eca6b7b2b39b6ee5e9b68b74e8912ebea
font_04_sfnt_off0001431e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431E 16720 bytes
SHA-256: 98be3629dd21071d3cf65aa3058f4785dc00457244ab3673e7253dd0f4c24576

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