Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b24d99121d9c53d…

MALICIOUS

PDF

86.5 KB Created: 2021-03-08 07:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 95972299b5e379abbd26d0a32bbeab24 SHA-1: d282e7778aabe6cc6c69613085e028e6b6eb4c01 SHA-256: 1b24d99121d9c53df98720d77b035456c5c264424b0f4d60583f8c0ae4273042
186 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://vilenefex.ru/wix?keyword=photoshop+touch+apkpure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453718/normal_5fddca6dba804.pdfIn PDF document text
    • http://bloodcraft.online/how_to_oil_nordictrack_elliptical19g1y.pdfIn PDF document text
    • https://tekazomegi.weebly.com/uploads/1/3/4/0/134017279/5578968.pdfIn PDF document text
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/b3dfb4e8f544.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/ab99fee.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/salario_minimo_2020_decreto_lei.pdfIn PDF document text
    • https://jazolesapixol.weebly.com/uploads/1/3/1/4/131453041/zasifuxezej_vegokexomafavit_zamadurejaj.pdfIn PDF document text
    • http://webmastervlad.ru/fovobuzirepamabulobygnf.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/can_i_get_disney_on_samsung_smart_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_60330c9fb22ba.pdfIn PDF document text
    • http://doctora.club/sales_agent_contracti5apx.pdfIn PDF document text
    • http://nashremont.site/white_bird_black_beak_yellow_feetg66kz.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/7828681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_60318472c7d2d.pdfIn PDF document text
    • http://kraftmann.su/telogonixezabzmf9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_60361df2d094c.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/online_payday_cash_loans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fcf3c0835fa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_692f2cb9ecdd4dc4b385818f87b2e9d8.pdf?index=trueIn PDF document text
    • http://wokarodefi.onlinewebshop.net/where_are_all_the_goat_trophies_in_payday.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_811c5431d7104722bcd6dedaa32a8ec6.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_85714b40983249bd99b62f547d738dfc.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_c5a49f62f92745c8be2195c7c8a7929b.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_20a1fe568e3b46b2b577a5351f4a29cf.pdf?index=trueIn PDF document text
    • http://vugugemo.atwebpages.com/99416378778.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_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 5052 bytes
SHA-256: 8e50dbce889a90ec3d70a0a684ba2a2c1efb68129c69fc6fe7a9cf3c2b280574
font_01_sfnt_off000127ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EF 10864 bytes
SHA-256: 1f603794ccefaed17418c84eec8690dcb469461a5809881e12dcf0b5dd7fb1d7