Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e389a84293f817e…

MALICIOUS

PDF

109.8 KB Created: 2021-03-31 21:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3dbcbde316c2ff92ee621c911ba7ee4 SHA-1: 2b474832a2a62833416d716356b441df94e4da56 SHA-256: 9e389a84293f817e45ed9b942a095caf72eb7adce580f3052d0b42706d6c62a3
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a large link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest an attempt to direct users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hatch+lake+ny+for+sale
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/f5bdb1ae.pdf
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/babevugenede.pdf
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/bumimajux.pdf
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/b1d18977ae.pdf
    • https://cdn.sqhk.co/bozawenibiwa/aiauWic/smart_and_final_turlock_application.pdf
    • https://betivaronapan.weebly.com/uploads/1/3/5/3/135350750/vuwix-vidirituw.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/bSjdtJK/how_to_cook_spaghetti_squash_noodles_on_stove.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b698999c-2557-41b1-b582-11f68f56ec7b/5954763098.pdf
    • http://ruzukelifibu.epizy.com/acuifero_confinado.pdf
    • http://bosirizowu.rf.gd/bing_search_ads_format.pdf
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_b380e85425c549479c6c859a0e1283ee.pdf?index=true
    • http://viputuv.rf.gd/cch_khai_c_o_form_ak.pdf
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_ca4df73dd1804005807e4b69475752c4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/45aca341-fe7d-4c54-95a5-e239f941a44f/samsung_bd-h5900_review.pdf
    • https://uploads.strikinglycdn.com/files/a3de25e6-dcf8-48f0-b93c-dffade165d1f/what_message_did_our_lady_of_guadalupe_say_to_juan_diego.pdf
    • https://uploads.strikinglycdn.com/files/084c6065-4766-4619-9daf-6b6f7515ec68/lincoln_and_guba_1985_qualitative_research.pdf
    • https://uploads.strikinglycdn.com/files/7e43bdc8-b6b2-464a-82f7-f247709a5603/vazegemekelarog.pdf
    • http://zikepodaw.epizy.com/ziwipovo.pdf
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_1fe5b5fa2cfb49dd8ca2e81f0908e686.pdf?index=true
    • https://uploads.strikinglycdn.com/files/865d96c8-5d2d-434a-8b63-a725dbc49d62/18557852715.pdf
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_f869cb433703410c89816f5094fb40cd.pdf?index=true
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_baf1ac80c3e143adb7fc9efb842f55c4.pdf?index=true
    • 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_off00016e9a.bin
e3fd691b8d1ea7e621cf87d5b3037bcbaee679c037fdb61575b82fbc78a8947d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9A 5096 bytes
font_01_sfnt_off00017ff2.bin
123e1168b154624ec82e8f4eac346a1e45d5a2277d197bac0a28920145db89d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FF2 11796 bytes

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