Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e8546f1e2e89ad…

MALICIOUS

PDF

75.9 KB Created: 2021-03-28 14:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 15f0fdc9e66f8b27bc3a516fba17c363 SHA-1: ce846b6bccdd5a06f4ff19f02005fae32d3cf564 SHA-256: c6e8546f1e2e89ad6f15ef9b89bf277d3f685327c5338ed96972cce872d145cb
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF's structure and numerous external links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=how+to+work+a+distech+controls+thermostat PDF link annotation
    • http://tewatag.medianewsonline.com/graco_duetconnect_lx_swing_and_bouncer_instructions.pdfIn PDF document text
    • https://wegusolojemirub.weebly.com/uploads/1/3/4/5/134597015/fd3a65f.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/xuxonijidodore.pdfIn PDF document text
    • https://risovokoxenixe.weebly.com/uploads/1/3/3/9/133997247/306403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_5278579a2df14d44933e31fe0e448cd6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19992e5c-a0ff-45c6-ab61-a9ce83d636c5/que_materia_y_energia_intercambiamos_con_el_ambiente.pdfIn PDF document text
    • http://vuropomap.epizy.com/56488190757.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/75231304496.pdfIn PDF document text
    • http://menolovot.rf.gd/41447350717.pdfIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_e61f31fa60ba4fa493f35b40751249b8.pdf?index=trueIn PDF document text
    • http://xusonusoxe.epizy.com/best_guitar_method_book_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51f8b09-208f-43bb-a360-232744429e77/nivatijexomepijod.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/how_to_read_weather_icons.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_37c5235288ad4dbab9236cb329bf6398.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_5bfdcdf68f104275a17de1c450e5c8a4.pdf?index=trueIn PDF document text
    • http://bawubaj.epizy.com/5476485888.pdfIn PDF document text
    • http://pifutujotot.epizy.com/group_bourdon_test_free.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_cc9f528204ad46aebb0af7491d4bd218.pdf?index=trueIn PDF document text
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_10e400e7368344b2b6dca32430d8695e.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_1aae15b4afc5417c8fe9a7c8f78eaf7a.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_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 5296 bytes
SHA-256: 75d6f4053949befc6737f47ac8b595082c0013c7c0f204d7ad60343ca03fc5fd
font_01_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 10464 bytes
SHA-256: d9b2c0ca26570948228353cdf4d94acf8d48703849aeb3abbdb8709df574f539