Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6a52b903ccb097…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 23:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15f8cb0318c6acc98093fcfd1b454140 SHA-1: 1efd8bca11f20fd42940c45432132da33d7f7b70 SHA-256: 8d6a52b903ccb09790a2a242b2614043ae4a80218dafd0a4fe394f1596cc9498
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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=san+james+catholic+church+in+perris PDF link annotation
    • http://jawixogu.mygamesonline.org/what_does_monster_symbolize_in_a_dream.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/aprendizajes_clave_biologia_primer_grado_secundaria.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/36236198109.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/98905241364.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_731e7d0ff73e429c9a92d68c9ee9ce19.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_ce274be45fd54595b9c852ffcd4b3368.pdf?index=trueIn PDF document text
    • https://7f0962a0-6951-429a-bb2b-5e038d64d202.filesusr.com/ugd/1b0481_cda87cfb242d4cdabfd8681528a26c5d.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_1e9cfbcb250343458f527127fd2029c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/lagu_blackpink_forever_young_mp4.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_e6dd6c9c9ff04281a54aad14b5d1d341.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_285df4cca09342408fad7645931ca69a.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_f9bd9903e0a64b2ca8bd6252f0d0b0ac.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_062634c484f74d8ab428fb3191896b69.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_42729e6961324548b38ec32d7c870a74.pdf?index=trueIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_3703b68179c54bee8be7d0cbb9830b8a.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_f22127369d324a74b798e941a283307a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesijesule/programa_honores_a_la_bandera_telesecundaria.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_914607f3ec5f433695092a3675a09d68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/sesepaxanaxixipedaj.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_47f01a592e29430387f534dad0dc2af2.pdf?index=trueIn PDF document text
    • https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_ae72cc4d423a41a787485db44bb7c93a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/boranorejabowa.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_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 5352 bytes
SHA-256: 858fcf47a1d053d0f71db4536da5687d6c393651abde77aaa664e976ea678709
font_01_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 12056 bytes
SHA-256: 020f74529a48f012bec3c0f963921da9baaf57955c87a077814ef1af7867582e