Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7d8c3ff2a113b5…

MALICIOUS

PDF

113.9 KB Created: 2021-03-26 08:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f7461ea7129166ced57e073924a5bf5d SHA-1: 9c37b9dff6ada26987f8fe1ccd7f3187106d554c SHA-256: fe7d8c3ff2a113b587413c662194cfb5f40066c8d4b053789b428a4681f705c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious sites. The presence of embedded URLs suggests an attempt to deliver or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=pueblo+natural+resources PDF link annotation
    • https://cdn.sqhk.co/zoribakim/idijaih/65207675342.pdfIn PDF document text
    • http://golomashvanna.xyz/128771145982cw31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_60133e5b9d443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_601fd42b8d252.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5fdf9f4b5c591.pdfIn PDF document text
    • http://5gusevshop.space/jilafejizofuneb80qn.pdfIn PDF document text
    • https://cdn.sqhk.co/wojidumezu/jaOgeUP/cursed_treasure_2_walkthrough_level_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60311f485dc5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fdb309e197a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_6040ff75838ba.pdfIn PDF document text
    • http://latuha.com/346223803665n7ms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6026aa94a28cb.pdfIn PDF document text
    • http://svoytrylend.xyz/602001431514sfy6.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/U4qgUgf/3d_tennis_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/phf67ig/problemas_psicosociales.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/hbiiWPj/33681413300.pdfIn PDF document text
    • http://macsk.space/basic_electronics_free_in_telugurs58c.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/b8a35235-653f-40a8-a503-f762bdc5e922/how_to_fill_rowenta_handheld_steamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372e4742-56d3-4e9c-8d5a-256d978aef1a/scorch_trials_book_pages.pdfIn PDF document text
    • http://budotosofikidul.rf.gd/hp_officejet_pro_8600_scan_to_network_folder_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51df32e-b083-4171-87ee-f71f686fe6cb/how_long_does_it_take_to_get_birth_certificate_after_adoption.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/lord_of_the_flies_by_william_golding_book_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBD 4936 bytes
SHA-256: dbac6253ad33d9cbabf1b05e4da845fa2f6f6663103ad09722ce50f4a994995c
font_01_sfnt_off00017f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8D 10976 bytes
SHA-256: e2e4beb3baa3d75cebe95c48da5d0f19ea3831737767a23c0e8df8af2428cb1d
font_02_sfnt_off0001a50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A50E 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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