Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ed67452d3ad7ff…

MALICIOUS

PDF

43.5 KB Created: 2020-04-03 08:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2021-05-26
MD5: 75afef0d7275ce29dc756b44d8c8b6ff SHA-1: befe9d88e0a50de42c31c348831e53fb98620905 SHA-256: 19ed67452d3ad7ffa28305befc906d061ca54569eb9ab8946c9edad4a9f4d7e3
136 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDF files, indicative of a link farm or SEO poisoning attack. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document instructs the user to decrypt an archive, a common tactic to bypass security scanners. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification. The document's content and structure strongly suggest it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://adoptme.info/uploads/1/3/0/6/130605426/130605426.html#que+es+el+escenario+de+flash+8 PDF link annotation
    • http://gradznanij.com/uploads/1/3/0/6/130604935/denituvijovupo.pdfIn PDF document text
    • http://serengetiusa.com/uploads/1/3/0/5/130551927/xaruwowaz.pdfIn PDF document text
    • http://cowboyeventing.com/uploads/1/3/0/2/130291822/takitadosopota.pdfIn PDF document text
    • http://stuhum.org/uploads/1/3/1/4/131482992/e35e8325029a.pdfIn PDF document text
    • http://erosgg.org/uploads/1/3/1/0/131070340/pabupojurudi.pdfIn PDF document text
    • http://sttheresefoundation.org/uploads/1/3/0/5/130543682/e67ae3ec4b66fa.pdfIn PDF document text
    • http://jokerthief.vip/uploads/1/3/0/8/130874615/zinewejubamut-nadim-varazedukemesu.pdfIn PDF document text
    • http://justkenosha.net/uploads/1/3/0/7/130740622/3725005.pdfIn PDF document text
    • http://tripowersystems.com/uploads/1/3/1/1/131163653/binipufajuj_zagolisuduka.pdfIn PDF document text
    • http://1technologyplace.com/uploads/1/3/1/3/131381781/2785848.pdfIn PDF document text
    • http://oliverokids.com/uploads/1/3/0/4/130476248/2173607.pdfIn PDF document text
    • http://aliabucciarelli.com/uploads/1/3/0/6/130639768/5141836.pdfIn PDF document text
    • http://ruthphysio.com/uploads/1/3/0/4/130483426/1502057.pdfIn PDF document text
    • http://beebrave.pink/uploads/1/3/0/7/130740259/woguzovid.pdfIn PDF document text
    • http://wiseway.ee/uploads/1/3/0/5/130539107/nigafavaruv.pdfIn PDF document text
    • http://kmdengineering.net/uploads/1/3/0/8/130874021/fiwelimi.pdfIn PDF document text
    • http://romanainvestmentsllc.com/uploads/1/3/0/5/130551342/katemopasem_gopuxa_dekuxiro.pdfIn PDF document text
    • http://myessentialguide.com/uploads/1/3/0/6/130603807/moraxasi.pdfIn PDF document text
    • http://avramf.com/uploads/1/3/0/8/130874125/dijelijozawa-gotitexezodix-risuvos.pdfIn PDF document text
    • http://fealsas.it/uploads/1/3/0/6/130604020/7347252.pdfIn PDF document text
    • http://miusbeautyshop.net/uploads/1/3/1/4/131437967/fb0f2954.pdfIn PDF document text
    • http://rudedogsms.com/uploads/1/3/0/5/130588307/konizuwa.pdfIn PDF document text
    • http://eeswfl.com/uploads/1/3/0/6/130620603/1d8639f93e8.pdfIn PDF document text
    • http://performancebalancer.com/uploads/1/3/0/7/130775649/8586496.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7E 8844 bytes
SHA-256: ef6c3269b0dc6555b30ca352855439cd55692ddab345ae5326962ee6a17644ba

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