Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed30a824550f119e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-10 07:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 010bfe95bc8200eb3b8e7019fe1f9367 SHA-1: f333e186a08b8bb6f36b891c69c7eeed27651b16 SHA-256: ed30a824550f119efa539948e354937ecc7daa54a1f256b2b48805d35323d021
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting, suggesting a link farm or SEO poisoning tactic. The embedded URLs and the heuristic firings indicate that the primary goal is to redirect users to malicious or potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=read+bengali+books+online+pdf PDF link annotation
    • http://nutejujaxi.66ghz.com/fovikoxobasepikoxijaxixaz.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/dictionary_english_to_urdu_free_download_full_version.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/75512202849.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/xatonukedelivomun.pdfIn PDF document text
    • http://debegezuvume.iblogger.org/84224757167.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/how_to_do_hesss_law.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/rusuzewew.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/65339524414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_9461ad2bd9ed4e43b0bb9dd86ce46329.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_fa1d7d07e32745e79c3394340a94795c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18486d54-a73a-4d62-a1a0-9b89be7eb32b/96598981267.pdfIn PDF document text
    • http://jajogagek.atwebpages.com/paradise_lost_book_9_themes.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_6e907d8af2dd4592b2e37ea5277076f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30aafb9a-bd21-477f-bda5-637fe3cf227e/the_lottery_shirley_jackson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c49744-73e3-45ad-a468-e1f1a89d00d9/is_there_a_walmart_open_on_christmas_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee058d8b-9144-4514-9f0f-8f7afa5e2f47/fafopakig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65a4e23-92c0-4c3f-8134-4a3ef227f396/vinipex.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/radio_shack_pro_106_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464e5023-353d-4ec0-9e03-c32e63631eb6/computer_networking_a_top-down_approach_sixth_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cae04a-2ee8-484a-8036-d9b29a455c70/cisco_7941_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3323c1dd-80ca-43e1-90c3-80dd66f08a0e/12283886826.pdfIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_8215a49211394d1facaf9dbf8d676a0d.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_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 5324 bytes
SHA-256: 280f9a4ab413cb92173d95a0ce9bd254a849c2ee78b7d9b4a62449531a03fd2c
font_01_sfnt_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 10168 bytes
SHA-256: afae9e8ed71811c77ff2da96d3ea4a0546a602f565583bd0f80cd35f9009416d