Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d516846b1911bb…

MALICIOUS

PDF

115.6 KB Created: 2021-03-26 10:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 95af8f37149b92e4007363ea8d16158d SHA-1: 51ee097eb5cfbc7cd5bd938ccae35f88e194532e SHA-256: e1d516846b1911bb16f2f8706a66a20bb80854047f9983a8dfb4d22c97369e07
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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://bologen.ru/123?utm_term=ganapati+atharvashirsha+lyrics+in+sanskrit+pdf PDF link annotation
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/284854.pdfIn PDF document text
    • https://kijidagidopijub.weebly.com/uploads/1/3/0/7/130776406/mejodi.pdfIn PDF document text
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/9673068.pdfIn PDF document text
    • https://figalinob.weebly.com/uploads/1/3/1/8/131871825/6207f0948176a0.pdfIn PDF document text
    • https://pafudufuwod.weebly.com/uploads/1/3/4/3/134326080/984bf89de77d1d.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/0e1af7a3b0.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/miguzutizenolanabef.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_62ee4524a79b4eed8bde3d0be158b8c5.pdf?index=trueIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_bcd96407b32c4adbb4529cfa8edbe6c2.pdf?index=trueIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_9b4b3c78bc72430ea22ea482de9831d6.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_521fd4a28de84c2dab786e5247aa5a27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/loraxoxoba.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/interior_architect_portfolio.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/82386307926.pdfIn PDF document text
    • https://5db246a0-94da-4013-9f64-c970003367b9.filesusr.com/ugd/ca5179_c4abfa84daa2428bbe33299944eaee56.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_5ddeeac43c89480cb9a3e89616789e84.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_afe5b70b7da846678a6edb579faaf2c7.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_09964caf05e14bfa80c9f55ce23cfdc8.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_e5da5d826dcb488bb061ed895c70b483.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/long_battery_life_apk_free.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017a9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17A9C 23448 bytes
SHA-256: d9805eadc3fa7636f7baf3060651dca4fca9a25b13259c0b503d221cdd9d1976
font_00_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 5500 bytes
SHA-256: e1d219ff0ba2fe49089214f2d6753f7e10f888de5c3db3a6f5af7c4f8f8a9617
font_01_sfnt_off00014a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7B 3772 bytes
SHA-256: e2c7bb3c6d2fbc6b9680c858ce58af9e5cd0e4fbc18f33bdd2ad1d5654d08a87
font_02_sfnt_off0001561f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1561F 10700 bytes
SHA-256: 7493825f4182e92843605b1e9275b41ec47e29ec2dff7245be8447f4aeae5cf8