Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a5bdb01806dbff…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 21:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa270c5b303c910ec076ebcd8639525a SHA-1: 907ea1af6c1a26dda461348db76633c780b6add4 SHA-256: 48a5bdb01806dbff8cc20440390316cb7977238fcae7325a199bd67f4cedae36
196 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, specifically indicating an advance-fee scam lure. It contains numerous external links, with one heuristic identifying a link farm structure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=best+prop+bets+super+bowl+2020
    • https://cdn.sqhk.co/wixefawoz/Iemksih/how_to_sharpen_a_knife_with_sandpaper.pdf
    • https://cdn.sqhk.co/wexunaveb/b6jemlX/zeus_living_inc_san_francisco.pdf
    • https://cdn.sqhk.co/numavagoko/jfbdqhb/mukemaminekumukuzokijew.pdf
    • https://xadafujivesa.weebly.com/uploads/1/3/1/3/131397927/5701736.pdf
    • https://titobuvidotid.weebly.com/uploads/1/3/4/5/134598786/jenaze_pukam_gomesijonurosoj_suxutubadeguxub.pdf
    • http://gosojojokin.22web.org/18_dna_structure_and_replication_pogil_answer_key.pdf
    • https://tewavifoma.weebly.com/uploads/1/3/4/4/134482239/f2d59.pdf
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/d4a0df.pdf
    • https://cdn.sqhk.co/nadizolobe/h7ppwCh/autocad_3d_printing_to3d.pdf
    • http://giwosoto.sportsontheweb.net/95221875889.pdf
    • http://metoxegid.mygamesonline.org/jenn_air_range_top_with_grill.pdf
    • https://cdn.sqhk.co/jipuxoxukul/Ajg8knB/island_in_the_sun_movie_filming_locations.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pujirageg/8095861939.pdf
    • https://s3.amazonaws.com/figugipopar/fubijogefowagevobetifibe.pdf
    • http://gezixus.myartsonline.com/3d_interior_design_software_for_mac.pdf
    • http://mimonutemabase.epizy.com/logolu.pdf
    • http://xevezowa.rf.gd/evenflo_reversi_stroller_instructions.pdf
    • https://s3.amazonaws.com/wibedubosateg/vopezafivolu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e2.bin
2245cf70f944f2a748b2b5e6bff825b650afdb4592d065b234bfb42377ee2f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 5160 bytes
font_01_sfnt_off0000fb94.bin
d46ca613d8077986a0b306ddaa91f5c6821e7b16086dfd07e6e7c795d1768ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB94 10672 bytes

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