Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d96fd32207ab6e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-20 01:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14cca538637e6cd4c6eaa09275cc8d9 SHA-1: b4b0b8f7433f70dbfc06832b76589299830780c9 SHA-256: f7d96fd32207ab6e432eda35efc83ae6d00e70020b7fc4ce77b690ee0eca7558
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other file-hosting services, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=christmas+dinner+party+menu+card+template
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/b103fb3a856dfe.pdf
    • https://semirenuzunep.weebly.com/uploads/1/3/5/3/135325284/1019473.pdf
    • http://xalenupom.getenjoyment.net/honda_gcv160_parts_list.pdf
    • https://cdn-cms.f-static.net/uploads/4496001/normal_604ac6793c046.pdf
    • https://nozoporunetub.weebly.com/uploads/1/3/0/8/130814805/6439570.pdf
    • https://cdn-cms.f-static.net/uploads/4473023/normal_6014aaef602d1.pdf
    • http://nupewijanetari.medianewsonline.com/software_development_manager_salary_per_hour.pdf
    • http://talkme-news.info/matematicas_discretas_y_combinatoria_grimaldicyqoe.pdf
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5ff65f405c63f.pdf
    • http://gufutaca1.xyz/xfinity_xr2_remote_tv_setup9zmgm.pdf
    • http://zukesijinizik.mywebcommunity.org/bejetusarowesujakapavoge.pdf
    • https://static.s123-cdn-static.com/uploads/4379849/normal_5ff2537e650e6.pdf
    • http://tujijamutibe.sportsontheweb.net/pofexusozimamezajirowixif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/894893be-3121-4bae-9fec-ce306ea1f60d/how_to_reset_ipega_red_knight.pdf
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_d5d370619d7346b5bf25ae186e6b4717.pdf?index=true
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_8c52a3edf3a84b3ca16963655b2aea29.pdf?index=true
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_20e890aeff93471cbd28fc6fe420995f.pdf?index=true
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_1f49f3bfa6e94cf892f13b21d4ed5eaa.pdf?index=true
    • http://xukokumo.myartsonline.com/zevililonewiwijerel.pdf
    • https://uploads.strikinglycdn.com/files/1b9d6c78-cc76-4f8d-bc9f-a7dd6d8fc427/23382623665.pdf
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_d362702409ef4186b55c4a19ddfdf2b2.pdf?index=true
    • 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_off0000d4c2.bin
9eec8848000c14ae25f436e938b054c1756a1702609fffe42ed06f6cc0fbe5af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C2 5212 bytes
font_01_sfnt_off0000e650.bin
13248a0692e7b8f6f6b753661a36503f45fcb39a4de308f14bd88f31d7e10218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 10344 bytes
font_02_sfnt_off0001098e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 4324 bytes

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