Malicious PDF — malware analysis report

Static analysis result for SHA-256 97832fd5cd0d5c3b…

MALICIOUS

PDF

67.9 KB Created: 2021-03-21 21:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 13ac79f7472880734e8e630933a39eed SHA-1: 1f932dd7ce6254069c57c62d5d23ecec0f01e0fc SHA-256: 97832fd5cd0d5c3b02bbe2f98336c146d77f82317fa1fb1ae5f182e74773f6be
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs, with at least one identified as a malicious redirector. The file's structure suggests it's designed to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=invertebrate+paleontology+clarkson+pdf In PDF document text
    • http://cyberghost.store/rehab_gear_trent_sheltonn13ia.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/QYIjjgP/benesove_dekrety.pdfIn PDF document text
    • http://wonder-ita.fun/24456378270y5a2o.pdfIn PDF document text
    • http://idealica-italiaofficial.site/kolokasalusuwuketoginun52whe.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/jhcGQNQ/wwe_raw_bleacher_report_results_grades.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/fAhehhS/sikobadusoluwip.pdfIn PDF document text
    • http://my-favshopd.online/what_does_the_ending_of_maze_runner_death_cure_mean6k2hb.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/075abc23-3f39-42fe-aa95-2b9e4c031997/how_to_pair_apple_keyboard_to_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/66110001534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a716b87-7b45-4e56-b789-67801198f403/la_maestria_del_amor_capitulo_12.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/kenmore_elite_top_load_washer_will_not_spin.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/music_player_apk_latest_version.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_5687f425df8641fc874021349141f9ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dd3908-76b0-4d2b-87ce-a13342852e88/contrast_hue_saturation.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/fetesatomaselisuvufomon.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/boost_bittorrent_speed.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_7021c67fa1ca42f0aa17d282925b7fe0.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_59685b69ad4340e8ac95e12f6a4f8f64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/fundamental_molecular_biology_2nd_edition_free.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_off0000c997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC997 5624 bytes
SHA-256: 311033039ad2edb2f5c3041b4586152fa79001e816111f64c0cd2a4b161961c0
font_01_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 10472 bytes
SHA-256: 66df939bb665099aa264aabe3ff3762a8a62dc757939eef9cddadb4913d7b0db

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