Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bdc2caa799f121…

MALICIOUS

PDF

80.4 KB Created: 2021-05-26 23:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 99101d0537950bc365deb7351c6ed23b SHA-1: 5b83482fd1ceb95002ae17017f9ee457a06fac6c SHA-256: 93bdc2caa799f121a78e8cc0ef0e103b364c2481a987da35d9934d30873bfd27
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://jottigo.ru/strik?utm_term=my+hero+academia+villain+deku+x+uraraka+fanfiction PDF link annotation
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/fabebad-mopigakof.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/ranisawavijomag.pdfIn PDF document text
    • https://duxizesojisuvab.weebly.com/uploads/1/3/5/3/135327590/6672715.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/wevubikumapi_figopekilazul.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/mizasa.pdfIn PDF document text
    • https://moxudula.weebly.com/uploads/1/3/4/8/134884970/7223797.pdfIn PDF document text
    • https://tuxatijofewimem.weebly.com/uploads/1/3/4/6/134686538/nosokedudife_mivumesadusaz.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/7d46a2c8.pdfIn PDF document text
    • https://jasoveloxera.weebly.com/uploads/1/3/5/9/135967924/bonedozobig.pdfIn PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/nujaz.pdfIn PDF document text
    • https://fozipomeripimak.weebly.com/uploads/1/3/4/6/134610298/lupenuxil.pdfIn PDF document text
    • https://demimawuna.weebly.com/uploads/1/3/5/3/135389973/4076425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470228/normal_6040ef07de368.pdfIn PDF document text
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/4313716.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/vuxifanirazanaf.pdfIn PDF document text
    • https://domigatozod.weebly.com/uploads/1/3/4/7/134717876/vowepiwiwidixep-zutunavakob-mukepib-nanezapugexa.pdfIn PDF document text
    • https://bategasef.weebly.com/uploads/1/3/2/7/132712490/03ecd231bae00.pdfIn PDF document text
    • https://moxisubisoxotap.weebly.com/uploads/1/3/4/8/134893280/tuded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_601ccc886cbe2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 5384 bytes
SHA-256: 70ed03a3fbcf063a418712e4abf8725c55ee0664f6f3f7e28950b80e63204eb3
font_01_sfnt_off00010ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA2 12072 bytes
SHA-256: c5d312463cd4b2766b3f26a8e7a43f2e112322a0d212a6b11c4f4771c14dc7fd

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