Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf2e3ff6be7ea74…

MALICIOUS

PDF

37.1 KB Created: 2020-06-13 00:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 4cbaca0f0b4e98e27dc5548c6c2f960d SHA-1: 3345c6bc913a2a010cced4eeeffcf8470b70cc9f SHA-256: ecf2e3ff6be7ea74663602b5574fa2e432a78c34034f7de7fd40d951e680a68a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a large collection of other PDF documents hosted on various domains. The document body contains garbled text and a URL, suggesting it's a lure to engage users with the linked content. The specific intent of these linked documents is unclear, but the technique is often used for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://lendersaxis.com/uploads/1/3/0/5/130588290/130588290.html#g%25C3%25BCn%25C3%25BCm%25C3%25BCz+t%25C3%25BCrk%25C3%25A7esiyle+evliya+%25C3%25A7elebi+seyahatnamesi PDF link annotation
    • http://jacobrosenfeld.me/uploads/1/3/0/3/130323409/tawero_duvus.pdfIn PDF document text
    • http://sweetthingsboutique.com/uploads/1/3/0/6/130604024/da9212.pdfIn PDF document text
    • http://access.eastjacksonschools.org/uploads/1/3/0/2/130272905/fekubilaxiw-lizabemad-tonufegumalegu-kajuti.pdfIn PDF document text
    • http://useekufindshop.us/uploads/1/3/1/4/131406739/nopogomojolanef_darotalet.pdfIn PDF document text
    • http://gracehappenshere.com/uploads/1/3/0/4/130436209/fopesuvagumenudu.pdfIn PDF document text
    • http://keysforkidsfoundation.com/uploads/1/3/0/8/130814652/zavusafalov.pdfIn PDF document text
    • http://theteachingconnection.net/uploads/1/3/0/9/130969195/9226213.pdfIn PDF document text
    • http://admin.sewcherie.com/uploads/1/3/0/9/130969595/viteligo-noson-xumugavepaduvev.pdfIn PDF document text
    • http://kharmarecords.com/uploads/1/3/0/6/130639114/pawim_makudonadim_kobovokarisoto.pdfIn PDF document text
    • http://myetinfo.com/uploads/1/3/0/7/130739026/1625169.pdfIn PDF document text
    • http://piatraderauplic.com/uploads/1/3/0/5/130589000/musesaj.pdfIn PDF document text
    • http://savanahjkingcade.com/uploads/1/3/1/4/131437889/dapokuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nonawegafoj.files.wordpress.com/2020/06/nirewonobugaromotokudono.pdfIn PDF document text
    • https://nabelugameka.files.wordpress.com/2020/06/runirubopozafoxoxu.pdfIn PDF document text
    • https://xilejabugagu.files.wordpress.com/2020/06/zekoxozigarugilekobibu.pdfIn PDF document text
    • https://domonukup.files.wordpress.com/2020/06/punikiditudetaguxexubera.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 11788 bytes
SHA-256: f7c4568f6e04f37aa4c198e72a46188117db7b55300560e7ef779c42e4625568

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