Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c73ad6094c6d031…

MALICIOUS

PDF

99.6 KB Created: 2021-03-27 23:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecc951c8917951b57a331c7c696fccf1 SHA-1: 80eb2f21ccca0db2c1241d46cb6dea48acb97705 SHA-256: 9c73ad6094c6d031d9fa2f5ab3661f150ee8bf1c850b009bf13a6ef15b9a4fe0
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 0.9994

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://resalured.ru/aws?utm_term=bose+companion+2+series+iii+specifications PDF link annotation
    • http://tawaguf.scienceontheweb.net/39106000201.pdfIn PDF document text
    • http://copriyghtconfirmed.com/porter_cable_c2002_review6kwj6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fd079b56fd99.pdfIn PDF document text
    • http://techanomic.com/40300677086ewpj8.pdfIn PDF document text
    • http://asta-stroy.ru/what_can_you_do_with_a_double_major_in_sociology_and_anthropologyl26r0.pdfIn PDF document text
    • http://mif-smeh.space/27133110962fwqpw.pdfIn PDF document text
    • http://swiss-family.space/notogalatorifoa1026.pdfIn PDF document text
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/wemafinoguxu-monanig-xogat.pdfIn PDF document text
    • http://bixesifebara.iblogger.org/wuxogikosuratapiwelite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_60038d3fc5eeb.pdfIn PDF document text
    • https://jadikabejoza.weebly.com/uploads/1/3/2/7/132740193/wogugijusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414339/normal_5ff5f492cb703.pdfIn PDF document text
    • https://zezikorerizuziz.weebly.com/uploads/1/3/4/6/134660856/7329934.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/111792877729cbk3.pdfIn PDF document text
    • https://zewazinox.weebly.com/uploads/1/3/4/2/134235380/busiwijo.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/nutovoruwuvelowazoz.pdfIn PDF document text
    • http://anarchymedya.com/anthem_of_heroes_apk_modqbmp2.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/warrior_made_keto_carbs_cookbook.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://fiwusinuba.rf.gd/76507059082.pdfIn PDF document text
    • http://fujesotes.epizy.com/28736784843.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 16780 bytes
SHA-256: 4e6424f068b6c385b8f5b27e86804df3b5ab3b9dc281d7e959ef7c4b98181018
font_01_sfnt_off00012143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12143 5100 bytes
SHA-256: c479499a20ac6bbce20e2952e164371a87a3d4bc12e84a4bb501459cf91fe274
font_02_sfnt_off00013274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13274 11916 bytes
SHA-256: d8035f48bff985ab156700cbaf75911945be07f61e34cb92095dd29b2d6def10
font_03_sfnt_off00015b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B34 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_04_sfnt_off00016ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FFC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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