Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e60abbbdabfd79…

MALICIOUS

PDF

75.9 KB Created: 2021-03-23 20:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1077ebe50cbe90f43e99cbff164a74e4 SHA-1: 64d0471a8389e2e0827f90ca4f4996201b010758 SHA-256: 38e60abbbdabfd7966128c664eb2e54f91df263658cb8e8d1637e3f3a03b317a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords like 'free robux apk pc' which are common lures for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://soxebez.ru/wix?keyword=free+robux+apk+pc PDF link annotation
    • http://tuligofabuwisa.22web.org/holika_holika_essence_mask_sheet.pdfIn PDF document text
    • http://zemegazi.22web.org/anbe_per_anbe_song_audio.pdfIn PDF document text
    • https://gemigefe.weebly.com/uploads/1/3/4/6/134602098/fipuvigerufev_raxukise_xotuweno.pdfIn PDF document text
    • http://lijovafe.22web.org/17090882657.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/be37b790a64.pdfIn PDF document text
    • https://sowodelomix.weebly.com/uploads/1/3/5/3/135315299/c05146e.pdfIn PDF document text
    • https://revivumusemob.weebly.com/uploads/1/3/5/4/135400225/8333229.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_64c8d7f84bae474d8ff885b843c6fa71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_much_does_it_cost_to_fix_ipod_nano_screen.pdfIn PDF document text
    • http://xufenazaliwe.epizy.com/abridged_classics_free.pdfIn PDF document text
    • http://liroporegabofi.epizy.com/diagnstico_laboratorial_da_anemia_falciforme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d55cecc-1090-4523-91fa-eda183ab269f/vamubij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64461343-c0d2-4c6b-90d5-e1cbe1a2806b/jirexutowudekuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5823d6-c74d-4534-8de7-dfc30e66aeae/93462351122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028076e9-980f-4bb8-aeb4-dc66b3fd0d60/3532695786.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_8b362e0962794b31905ab858de2bd4e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/78976072311.pdfIn PDF document text
    • http://xilavivugup.epizy.com/which_streaming_service_has_the_harry_potter_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c21104-be5d-4ab0-81c4-2788e88ab8e4/fomijojuvunoger.pdfIn PDF document text
    • http://fixadamobus.epizy.com/8421065576.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/how_to_stop_the_worry_and_start_living.pdfIn PDF document text
    • http://sokiguxesixup.epizy.com/calendario_liga_mx_apertura_2020.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_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 4944 bytes
SHA-256: d52dd28831417da3a3b867a7ef8b3ec28b81ab4f9581570f8308d44f8d037059
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 12136 bytes
SHA-256: 62718b45b0b1d8bb0f671464f9d5933fdfeb1dc9507222d799a1171032111529

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