Malicious PDF — malware analysis report

Static analysis result for SHA-256 f030e76c41528f09…

MALICIOUS

PDF

79.8 KB Created: 2021-03-01 01:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54982a91fc68bbb414718a0a81eca2b9 SHA-1: 5041a5b740003df30368677fcc468df0e00c61a0 SHA-256: f030e76c41528f096d6bd47d8cbdfb5ce9ab81c753cb774d5eceff1542c24d31
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or credential harvesting campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is part of a link farm designed for SEO manipulation to lure victims. No scripts were extracted, but the overall structure and URL distribution point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=multnomah+county+divorce+mediation PDF link annotation
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/3268706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_60006bb10d4cb.pdfIn PDF document text
    • https://kibajalixil.weebly.com/uploads/1/3/0/7/130739780/d9bf168bbbc05a.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/xomapufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_60055801cf364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_60161429ac99b.pdfIn PDF document text
    • http://nikecortez.net/43360953572aztgb.pdfIn PDF document text
    • http://shopsupergood.site/history_of_lung_cancer_icd_10l1t7p.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/SdCrifY/rizupesesoriwomegupikur.pdfIn PDF document text
    • http://heliusdesign.ru/tecnicas_de_redaccion_coherencia_cohesion_y_concordanciaz6qi2.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/derijumozokudir-levoju-suderikejumi.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/kokijiretevoxaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_5ff96bf7035af.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/16256387680.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/republic_of_doyle_season_6_episode_10_cast.pdfIn PDF document text
    • http://gratoramm.website/24993845755xbys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pusapovewazigu.onlinewebshop.net/69325881910.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 5052 bytes
SHA-256: 5df58de7b09d32814c552053c1c15d783ac4c8a5eb5fe790b324d63a06864e15
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 11460 bytes
SHA-256: 7f9ae582514d3070775f3244152d7fd41a53654a685ae5092d8654e70c6a53cf
font_02_sfnt_off0001242e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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