Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5afd1548c00a0ab…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 03:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eb4f820361329f33f6e33ac7bfbf87ec SHA-1: eb693aa0276a5a0695574b416e1b8124dcf8f602 SHA-256: f5afd1548c00a0abdff7220fccce2926c2b03245a028281535306a8189eaae8c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=kenmore+stand+mixer+accessories PDF link annotation
    • http://kidepokapila.22web.org/78301526644.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/wovovoluvoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_60183d5d94443.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/maze_runner_trilogy_4k_blu_ray.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_600b388c0298e.pdfIn PDF document text
    • http://idealslimitalia-official.site/86046207207xvxsq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_600a578040e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_602d5d06d9f42.pdfIn PDF document text
    • http://lavkavkusa.store/flysky_fs-gt3b_transmitter_with_receiver44rgt.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/what_is_cof2_polar_or_nonpolar.pdfIn PDF document text
    • http://clientesdkb.com/c_e_a_ka_full_formhfwxn.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/origami_software_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumilamufitilu.epizy.com/79129401690.pdfIn PDF document text
    • http://losirerosusakaf.rf.gd/where_can_i_buy_one_touch_ultra_2_test_strips.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_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5088 bytes
SHA-256: 371b819ea55405e51f278c85958baa84bbc97d41f74fe747670188ab849cde9e
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10636 bytes
SHA-256: 8cf0d6ba6efbf162c248b3da55b46648754d68ab13f5f696777b792f89723231

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