Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa27d141ae3c61eb…

MALICIOUS

PDF

123.3 KB Created: 2021-03-11 13:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1abfa94955c306d834ad1338b3de0f9c SHA-1: bc6591cdb6fae9dfd0f8d2375f3fb88ebb66d8ec SHA-256: aa27d141ae3c61ebe775891d7cb980ef70c9d35ee91b940b17c938356afafffb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the presence of numerous external URIs points to a phishing or content-luring attack pattern.

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://resalured.ru/award?keyword=angular+8+tutorial+espa%25C3%25B1ol+pdf PDF link annotation
    • https://ninofupefuf.weebly.com/uploads/1/3/1/8/131856131/givivusunixiz.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/denavegozuzuwowozo.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/dell_optiplex_790_specs_sff.pdfIn PDF document text
    • https://butijewib.weebly.com/uploads/1/3/4/8/134886415/garetavevegefup-mevedojukeruru.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/free_digital_marketing_plan_template_word.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/vogileluf.pdfIn PDF document text
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/1080235.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/7943168.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/1ujfLDE/drive_download_quota_exceeded_for_this_file.pdfIn PDF document text
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/kagavefujixidi-xulijupulufaw.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/simbolos_de_los_diagramas_de_flujo.pdfIn PDF document text
    • https://sajefabavasa.weebly.com/uploads/1/3/2/7/132710755/7232433.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/sexupimi.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/hcL1Fuf/wallpaper_love_live_cell_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_8fc1ea50c2804d79ad2cb342ae0061ec.pdf?index=trueIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_c57ee4e8d9d3433d89b76cb23d724424.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_b5d5482807154f918d0509c3f3c2a4f8.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_492601d5b0e24dfaae8fdd8c73a08713.pdf?index=trueIn PDF document text
    • http://pebomotixot.myartsonline.com/rpg_maker_vx_ace_dlc_free_download.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_off0001a7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7FF 5604 bytes
SHA-256: 84dbf7712924f72cc5083dfed1ee6a73a764e2cfaf66db0feb7741387e33f3af
font_01_sfnt_off0001badb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BADB 10056 bytes
SHA-256: 3074c85eb0dbf009e64796429cbfd2990d91d8eeaddf20e5356c4332c99eef8e

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