Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca283707e6c31312…

MALICIOUS

PDF

78.6 KB Created: 2021-03-23 20:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5432d7465e3257503afea3fd06d28fce SHA-1: 1291b607dc8ea7d46751ec0aa975ed909c3a686c SHA-256: ca283707e6c313122d8bd7388f9de0607f98ea31dee6428e511c8e1e3f48787d
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-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://dafemum.ru/aws?utm_term=what+is+the+best+mbti+test PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451930/normal_5fe266168289f.pdfIn PDF document text
    • http://pewujok.mypressonline.com/brother_cs6000i_bobbin_winding.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/how_does_the_education_system_reproduce_social_inequality.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_602e727faa0d2.pdfIn PDF document text
    • http://ru-dev.xyz/cuantas_clases_de_sistemas_operativos_hayyd9tj.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/christmas_carol_book_download.pdfIn PDF document text
    • http://gonzo-3d.com/resemubedomle4mu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fc9560027c3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5fc84065e5d50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipesunerep.epizy.com/9726859837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f059ecce-3700-4dfa-a34a-637e68fe4492/70006989074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c2b204-f7ce-46ad-9e31-f2be6b329a9c/potawokem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01dfc040-ce8c-4dd2-9fed-3a9977e4e856/78976348172.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/diccionario_ingles_espanol_tecnico_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33110f27-0b8e-4a68-8fdd-79149be8558e/how_positive_self-talk_can_transform_your_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cc8296-389b-4a5a-8009-28aec69a919a/rigawofaponibakoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1542c11-e71a-4874-90ed-96563f5a89b3/51941369113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbfd1c3-8fec-49fc-8027-db4cee0b7dab/how_much_do_primerica_reps_make.pdfIn PDF document text
    • http://wedukifolinewa.epizy.com/tazasafivamojebexevad.pdfIn PDF document text
    • http://rurebafib.onlinewebshop.net/benefejusifa.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_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 2856 bytes
SHA-256: e2311b8fbe1dc1a952e21749f76e265760435da701d53ebcd777d623ab36c325
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 4948 bytes
SHA-256: 391bcc4b7c3872655d5aae7dfa06708b518f85b285af10e975e5373b6a9077ca
font_02_sfnt_off00010758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10758 11076 bytes
SHA-256: 37ff1b3c8d0176cfe3298decc864937fe4efc3f105ff03f0384f6dee731168a8

Open this report in the interactive analyzer, or submit your own file for analysis.