Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddfacea58639524…

MALICIOUS

PDF

75.2 KB Created: 2020-11-23 14:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 905e71b6ff2781dd03bb87fd0f405879 SHA-1: 718eef851e4c2bea62ab175f301dd94ac7bc1afd SHA-256: 3ddfacea58639524420315916f2492793621d64b8da9dfd26158a40a8065bd46
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The presence of a link farm heuristic and a high ML score further indicate malicious intent. Although no scripts were extracted, the document's structure and embedded links suggest it is designed to redirect users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/123?utm_term=swains+offering+crossword
    • https://cdn-cms.f-static.net/uploads/4404730/normal_5fa49413d9bbe.pdf
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/kewawurotenitil.pdf
    • https://cdn-cms.f-static.net/uploads/4409096/normal_5fa2a764c57b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dozuga/aankhen_2002_hd_720p_movie.pdf
    • https://uploads.strikinglycdn.com/files/3416e17d-ef85-4e7b-9a7a-79fea42b368a/outcast_second_contact.pdf
    • https://uploads.strikinglycdn.com/files/6fe40165-1913-43ad-aa4d-0d1b826fecf7/xijubavanarevoxarubu.pdf
    • https://s3.amazonaws.com/davawina/sims_apk_hack.pdf
    • https://s3.amazonaws.com/lebaxa/again_young_thug_gucci_mane.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/virgin_mobile_prepaid_android_phones_at_walmart.pdf
    • https://s3.amazonaws.com/tobovunoberiki/sazesusolumir.pdf
    • https://s3.amazonaws.com/badodemebo/12795351983.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_off0000e857.bin
8069f250358709150bff9f5d90682f3c4fd2112c7f67ea8c898b65aaea4d776d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 5352 bytes
font_01_sfnt_off0000faaa.bin
2e7a60c72d2e55dbda1acc6da6cef4588b086f8139ca186ae5454d14172674d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10916 bytes