Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ab0e8c27de0ca6…

MALICIOUS

PDF

79.8 KB Created: 2021-03-06 01:38:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2371b2b65c9dbbecfb3f1a865d5465a0 SHA-1: 8948ad080b92082be2935e4bd8e1237119a0cd33 SHA-256: 35ab0e8c27de0ca6edb9657b6a86be36041f48898f9f0ded9a7dbfa8a72caa7d
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to a domain designed for SEO manipulation and phishing. The primary lure is a fake download link for 'gregg braden the isaiah effect pdf download', which redirects to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/wix?keyword=gregg+braden+the+isaiah+effect+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427528/normal_6038450370bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_600ff947d0c67.pdfIn PDF document text
    • http://wei-nmvc.com/cisco_ise_2._4_license_ordering_guidefzah8.pdfIn PDF document text
    • http://repochka.site/weber_cooking_grates_cast_iron_vs_stainless_steelyqjlv.pdfIn PDF document text
    • http://indital.fun/89008873158ojimv.pdfIn PDF document text
    • http://tifebozazam.iblogger.org/jepowajubogebupiwabodol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_6003ab22704b7.pdfIn PDF document text
    • http://fuluvil.iblogger.org/mofof.pdfIn PDF document text
    • http://ru-dev.xyz/how_do_i_stop_my_keurig_from_filling_up30t9d.pdfIn PDF document text
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/ca16d14ca3bbb.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/444b6d046cd0b.pdfIn PDF document text
    • http://uscarinsurance.info/balivajanezimiguferas252s.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/webipejonavuv/sefuvusesufopotupujilot.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/anabasis_arriano.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/free_tv_and_movies_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1630700-7dbe-4aab-958c-f851a6504783/communication_style_quiz_for_couples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b71dec-5ae9-4bfb-9245-9b216451f2c2/toro_power_max_824_oe_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b53c1c-0065-4f95-b83e-205ac235406c/10814397997.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/aiscat_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/82079140007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d903ef-3d94-4e97-9261-4687f8f33add/how_much_is_ps_vita_slim_in_nigeria.pdfIn PDF document text
    • http://rimojiruseb.rf.gd/79114660097.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 5680 bytes
SHA-256: c0eaadbd67a17fe11648f5bf00a1d887d1a88bfc6c57920eb4922fefaf8d20d0
font_01_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 10604 bytes
SHA-256: 8e0cfa3d361bb491b607ca3958f244912ae9ffe0640deb8e2f84d8522fd189bd