Malicious PDF — malware analysis report

Static analysis result for SHA-256 694d66a305241fb6…

MALICIOUS

PDF

89.6 KB Created: 2021-04-30 20:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bc8c3b2c63b306bea2519854fb7cba3 SHA-1: 6cd90cc62b8a617b6f9deba0e79fbd514ccc2fe4 SHA-256: 694d66a305241fb69b293c679257eeb019de457f7ac329e3ce0b2a30be555f13
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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
  • 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/strik?utm_term=vampire+hunter+armor+mod+skyrim
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/4022194.pdf
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/6273364.pdf
    • https://cdn.sqhk.co/pagupuxu/jghd0A0/radio_shack_catalogs_online.pdf
    • https://zuwisikap.weebly.com/uploads/1/3/4/4/134441997/doduk.pdf
    • https://pivamuwonojazop.weebly.com/uploads/1/3/0/9/130969183/lexukexidig-jirokoj-kufezanej-pudefasatal.pdf
    • https://cdn.sqhk.co/worupageke/heLE0ja/new_billboard_music_2018.pdf
    • https://fowerorizer.weebly.com/uploads/1/3/1/8/131856705/6468755.pdf
    • http://xolokukifimiv.sportsontheweb.net/sisobavabujavivenibaro.pdf
    • https://cdn.sqhk.co/lusikagidet/qghZoic/tenugulasez.pdf
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/koxowilorajiru-sofemazawosed-xosinesasemikun-godax.pdf
    • https://cdn.sqhk.co/ragojagef/bhcCnge/nbc_sports_philadelphia_female_anchors.pdf
    • http://pafowitowa.medianewsonline.com/rebadaxosanowolije.pdf
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/begokasa.pdf
    • https://vesasasafej.weebly.com/uploads/1/3/4/7/134758359/382e5f4b7a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_d9a41c3c38c74dfdba41c5ddffb5af1e.pdf?index=true
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_b44d571294c14387997d2d19521fb4ee.pdf?index=true
    • https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_3360dd655763426387025d1cde8d95f9.pdf?index=true
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_d6aadac04390410f86a6c01736221c90.pdf?index=true
    • http://malejubu.myartsonline.com/ladafufinabigevur.pdf
    • http://wepunulirepobi.myartsonline.com/learn_algorithms_and_data_structures.pdf
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_0c9f120637434d8fb75ccd58ee806b0f.pdf?index=true
    • http://zonurupadul.atwebpages.com/analisis_economico_definicion.pdf
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_d41e5462dc994f4cae076d510885ba08.pdf?index=true
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_706de4d91e5a42af86348831b68468cb.pdf?index=true
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_419bd0abf762440aaca77aee3398bc49.pdf?index=true
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_654eb19cd2564a7588e78e75bc7e777a.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089b.bin
c5c0c01ab128975962d51c16c9dd6bb2f1335825a8c4ff11a3da7a53dd6ca4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 5296 bytes
font_01_sfnt_off00011a7a.bin
4ba02ad47f6e88477aa0f5d88495c78780a3c00c7a12583ec165c820c427a80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 11340 bytes
font_02_sfnt_off000141a1.bin
13873d145b8da2256cc9aff7ec32aedf7dd7de0e65fabb376e0f91dd1eea3996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141A1 16196 bytes

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