Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fd17e71111a6f7…

MALICIOUS

PDF

83.7 KB Created: 2021-03-07 02:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b463b78b2f774fe34768043668d5fe8e SHA-1: 4ddd97345458225aef18e759b1924f4d99f5b5ab SHA-256: b7fd17e71111a6f7f070db368e9571c05d5dae05a06c84d433f8b58f8dbfbc9e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a link farm, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic specifically pointing to a large number of external PDF links. No scripts were extracted, but the presence of numerous external URLs is a strong indicator of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://dugedepap.ru/123?utm_term=graco+magnum+x7+airless+paint+sprayer PDF link annotation
    • http://jologedeb.getenjoyment.net/bissell_proheat_2x_revolution_pet_pro_owners_manual.pdfIn PDF document text
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/4221437.pdfIn PDF document text
    • http://test123test.xyz/pete_the_cat_halloween_read_aloud_bookva6kl.pdfIn PDF document text
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/a7f6d31259.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/zaxarefuduko.pdfIn PDF document text
    • http://setovewurepenu.22web.org/angel_eyes_song_free.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/shiva_sutras_explained.pdfIn PDF document text
    • http://topfrag.rip/14298888091ng6n.pdfIn PDF document text
    • http://moneyindia.site/jenageridt8zqx.pdfIn PDF document text
    • https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/bavurox.pdfIn PDF document text
    • http://fb-ig-copyright.com/kanituhefvo.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/449ba8d.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/8aff2d7218b50f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savifin/gokogebigud.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/borefijegusof.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_c23c50ebf02f4f1fbea33a61483e93b0.pdf?index=trueIn PDF document text
    • http://zojimako.rf.gd/python_iterate_dictionary_sorted_by_value.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_d4138924999a46c293d9f95159908fc2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/samsung_un32j525dafxza_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/96243473795.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/zapuwunepapudesa.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_1d367c7f964345f0bad9d88bcdd18e34.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_44a16aeb96ca420a8b2cb95a6e11dbda.pdf?index=trueIn 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_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 5532 bytes
SHA-256: 01d575b33e2d8e5af9e1e7c0177a34b76ffc509dc9db96b40314b509baeb0753
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 10608 bytes
SHA-256: 2f9d72943deab5bc0981190db507b56a46712f1007254d77c9847b7074cb03a8
font_02_sfnt_off00012c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C39 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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