Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9707a133538b181…

MALICIOUS

PDF

85.1 KB Created: 2021-03-10 03:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 522c597fce2d79974dab09847695c981 SHA-1: 3db1f2f145322da59b11d12c51b43c403a44f7e8 SHA-256: e9707a133538b1814f5e022acf5ab0be457d528cff5b277076578e62df9a92d2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/123?utm_term=carbide+motion+v4 PDF link annotation
    • http://martakkord.ru/honeywell_hcm_350_humidifier_near_mevmw9p.pdfIn PDF document text
    • https://jisetufazuv.weebly.com/uploads/1/3/5/3/135307323/zuvibuvatapot-dolokogunisal-mozila.pdfIn PDF document text
    • https://rivezotuxo.weebly.com/uploads/1/3/5/3/135337491/761f41afdbb8f0.pdfIn PDF document text
    • https://pevetuximamit.weebly.com/uploads/1/3/1/6/131606263/fejibodofef-kenozo.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/c10b0.pdfIn PDF document text
    • http://umniashka.ru/forms_of_energy_worksheet_3rd_grade6pjna.pdfIn PDF document text
    • http://onlinetyz.xyz/fudimipunuliraraxoziwx67a1.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/147969.pdfIn PDF document text
    • https://koximewi.weebly.com/uploads/1/3/0/7/130775363/xomowe-sakurewev-xugowiz-zidumam.pdfIn PDF document text
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/nokogif.pdfIn PDF document text
    • http://universe1.space/vegujikanirelik3q3g.pdfIn PDF document text
    • https://noripuluse.weebly.com/uploads/1/3/5/9/135957130/9050874.pdfIn PDF document text
    • http://italiahot.space/giminixexilanasapi6moao.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/3457968.pdfIn PDF document text
    • https://bebabigi.weebly.com/uploads/1/3/5/9/135977904/gedazimezodejig_dizagi_zetaw.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/8676930.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/eda8815d-216c-434b-a56d-1154d27a114e/54296848489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4127d9a9-9ae2-41d6-ac9a-b6df6050ff0d/apa_format_essay_example_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99348c8-c681-494a-b1f8-a9c44311104d/26361894143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85c9051-6f94-460e-8695-73fae30cf814/where_can_you_watch_the_stand_1994.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_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 4956 bytes
SHA-256: 62044dcde2052fdfcd6ae53e184310449c610c9e7f2280faeb3379d17e14889f
font_01_sfnt_off00012084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12084 11424 bytes
SHA-256: ad00d9bac3873e46bac9550f0fbc2c39bd7efb7469bc9e62e27204a43b9de73e

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