Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac6229874e00187…

MALICIOUS

PDF

168.5 KB Created: 2021-03-12 05:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0b809a11dc858fa5f2b8c9e3d0c542bc SHA-1: a83e1c05fcffbb738d4bb1b1d08620ec19d3c788 SHA-256: 7ac6229874e00187fbfc7914afa7aa9ede35403880c60bf1c94ce6f26e5d424d
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF's structure and embedded links indicate an attempt to redirect users to potentially harmful content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/123?utm_term=chemotherapy+induced+thrombocytopenia+guidelines PDF link annotation
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/bf7d5d3d.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/IjfMjf3/motocross_racing_wallpaper.pdfIn PDF document text
    • https://garirebed.weebly.com/uploads/1/3/4/6/134669878/5787935.pdfIn PDF document text
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/verikobomavovuwemo.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/gcgiIx7/moguwufusugowosiv.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/mutitanuvosip_rofavepufip_bezugufa.pdfIn PDF document text
    • https://nixodogal.weebly.com/uploads/1/3/0/7/130739919/2026471.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/fkifgia/lusej.pdfIn PDF document text
    • http://igcopyrightclient.com/62125668086au3ss.pdfIn PDF document text
    • http://goodsun.space/california_politics_a_primer_freesds2u.pdfIn PDF document text
    • http://maska-respirator.com/juzuzafepagyg8sm.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/2a9a2a2d-ea7d-463a-9b5e-b0b17ab31498/meaning_of_the_number_6017.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/vetuvem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455b3f74-de11-43c7-8b98-05eee7eba5c6/13174060864.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/aashayein_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07eaf1e-46bd-4a80-8b7a-07a971b20422/formula_para_el_area_y_volumen_de_un_cilindro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05e77b-7242-44dd-834e-43e7bc2a03b2/tin_tin_restaurant_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b8932c-0ff7-4212-a939-e1d0095db566/how_to_reset_your_thermostat_honeywell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768ad760-7414-4c19-a78b-a7049e098a87/how_to_wire_a_motion_sensor_light_without_a_switch.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_off00025524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25524 5632 bytes
SHA-256: 9d5ad1fc20f3cf9e9b2c817c0df357e68c58258802cd5ffa82d61590bfd1eab2
font_01_sfnt_off0002681b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2681B 13904 bytes
SHA-256: a0321877a62edb19941e1cc3cbae3fca034af47b02f3e5802f61bd5be3157edb

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