Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed56f07095d3517f…

MALICIOUS

PDF

79.2 KB Created: 2021-06-02 17:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23e7d2a90b62725077e93b501eff0918 SHA-1: 718a300b70319a195cba04847c0e5a2e387d729a SHA-256: ed56f07095d3517f0e0df14e0a74954bb0a17b0e8cbebfd69cb2f058fdb9da8f
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, many of which are to potentially malicious or SEO-spam sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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-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://bologen.ru/123?utm_term=akkada+abbai+ikkada+ammayi+naa+songs
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/ec3cf120ac2828.pdf
    • https://tulugawaluga.weebly.com/uploads/1/3/0/9/130969515/tituweboju-sulabajemorena.pdf
    • https://cdn-cms.f-static.net/uploads/4385198/normal_6027e59b3a219.pdf
    • https://cdn-cms.f-static.net/uploads/4501229/normal_604ddca7b3931.pdf
    • https://cdn-cms.f-static.net/uploads/4459163/normal_60207b0a30928.pdf
    • https://loxufezikuwudi.weebly.com/uploads/1/3/4/6/134687227/gaxefis_xexegiresijise_nasekofalobuve_betesakiluwir.pdf
    • https://static.s123-cdn-static.com/uploads/4418981/normal_6007202814a8e.pdf
    • https://cdn-cms.f-static.net/uploads/4485001/normal_605d5801c7d2e.pdf
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/483779.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bovojigu.pbworks.com/w/file/fetch/144424608/como_desenhar_anatomia_-_figura_humana_-_vol._1.pdf
    • https://uploads.strikinglycdn.com/files/3b11a89a-7287-4f32-9105-1dc90c2a1f9c/2922842553.pdf
    • https://uploads.strikinglycdn.com/files/3fa21736-7e8b-40d6-8334-85539e6a6332/international_business_jobs_atlanta.pdf
    • http://sinorodolu.pbworks.com/f/lenovo_lt1421_driver_mac.pdf
    • https://uploads.strikinglycdn.com/files/e0811f7f-287b-480f-8398-93e80856f2e9/mikunuduxozixozejaremase.pdf
    • https://uploads.strikinglycdn.com/files/903a4277-a4c3-44a2-bde0-04a395a8f39e/12916071088.pdf
    • http://poforezufovu.pbworks.com/w/file/fetch/144451173/reiki_the_healing_touch.pdf
    • http://vogituvu.pbworks.com/f/rikoponerupomikejes.pdf
    • https://uploads.strikinglycdn.com/files/05dc412a-f6d2-4538-85a4-7c86e621acb0/59535907319.pdf
    • https://uploads.strikinglycdn.com/files/dc88cab8-9d94-403b-8814-020e7095f486/romeo_y_julieta_resea_del_libro.pdf
    • https://uploads.strikinglycdn.com/files/868e3b48-7caf-4719-a91e-ea4eaeaeb6c3/list_of_john_grisham_novels_made_into_movies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca1.bin
6391ad240810d1862412cc2acf621fb1d67eee31fa2dec460e08470bc5f6591f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 4904 bytes
font_01_sfnt_off0000fd30.bin
a7f2461c404497a13815b3b60cd0c7a4da0e7c4b9ecef8bfcce7b845f4c094ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 10692 bytes
font_02_sfnt_off0001218d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1218D 4324 bytes

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