Malicious PDF — malware analysis report

Static analysis result for SHA-256 df58ab669f1bd287…

MALICIOUS

PDF

78.1 KB Created: 2021-04-17 18:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1408becbcf0c03f61a7d08a8949755 SHA-1: 33d8ffeccac5457b8848c97867f2e970277da9a3 SHA-256: df58ab669f1bd287df4fc9f80fd97f219a6422ef9c256faf0bf95ce5b0fb1082
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with the primary suspicious URL being https://ponafet.ru/strik?utm_term=nasb+super+giant+print+study+bible. The presence of a link farm suggests the document is designed to redirect users to potentially harmful content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=nasb+super+giant+print+study+bible
    • http://kaxupazider.22web.org/bivariate_regression_analysis.pdf
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/3485e9354d582.pdf
    • http://ropufogesuzazeg.iblogger.org/boxing_star_mod_apk_android_1.pdf
    • https://jalizirut.weebly.com/uploads/1/3/5/3/135308553/sukinekov.pdf
    • https://sutogeva.weebly.com/uploads/1/3/0/7/130739298/rafulewifigezatapu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/96cc0f40-af81-43a0-986d-a33a5c923924/can_you_see_navy_seals_training_in_coronado.pdf
    • https://uploads.strikinglycdn.com/files/13537c26-70ff-4dba-9250-c031fa9568bf/tribes_seth_godin_barnes_and_noble.pdf
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_a7ce8b98c5034e3f9ffbc66a84bfccb7.pdf?index=true
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_77a419183c1f400c9203ad3a457f480c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5871a1ac-f680-4c41-80a7-470e56064791/71584986805.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/ziweputovepozutinifexo.pdf
    • https://s3.amazonaws.com/sefipa/fm_whatsapp_free_latest_version.pdf
    • https://uploads.strikinglycdn.com/files/a5fdd5ce-36f0-4907-b1f1-bf8473b456e3/68680368754.pdf
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_f17a375361434595a0ad2e3c0b655303.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f1d71bfd-dec3-49f3-8745-7b2a41a6a99d/gididerukifunagipavetor.pdf
    • https://uploads.strikinglycdn.com/files/7dc1e249-11b1-4e17-9f7d-095c007e6214/dbt_interpersonal_effectiveness_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/c360abe9-9683-43e9-ba53-51bf148ca50f/vomodikezanedizikif.pdf
    • https://s3.amazonaws.com/zazelujeju/icloud_select_all_photos_to_mac.pdf
    • http://wivakixisataso.epizy.com/86219601278.pdf
    • 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_off0000f225.bin
52a493216138aa3afd8aea8c3c8ceb7b0abbdc45614bde0b4984c0f6c88ab5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 5336 bytes
font_01_sfnt_off0001045f.bin
7d68eb97a42f83392ac53ddd81be7438173532bc916389ad851c61bebf56eb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 11984 bytes

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