Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a00ecd8fcc15287…

MALICIOUS

PDF

62.7 KB Created: 2020-06-09 01:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 979ad5bfdaddd57bee23f93563138c73 SHA-1: 7bb04fc54467e697010b0aef6f61b5dc4dee284a SHA-256: 4a00ecd8fcc152871dfaa0b6387ba896550dada5b23c610fbf4d98a8f7a9f5a5
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO poisoning or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with 'lacouturedelizabeth.com' being a dominant host. The document body, though partially corrupted, contains text suggesting it is a 'trophy guide', which serves as a lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the primary malicious activity appears to be directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://wolfecityhomecoming.com/uploads/1/3/0/3/130379049/130379049.html#ys+origins+trophy+guide PDF link annotation
    • http://lacouturedelizabeth.com/uploads/1/3/0/5/130545128/ef4cb0ef2e2f58.pdfIn PDF document text
    • http://g2gtraining.net/uploads/1/3/0/3/130323603/3323104.pdfIn PDF document text
    • http://cpanel.adambenham.com/uploads/1/3/0/3/130379625/divepum.pdfIn PDF document text
    • http://handmadefashionscarves.com/uploads/1/3/0/8/130874095/zofojapugovizi_zobaxad_tokopador.pdfIn PDF document text
    • http://nelsonvilleohio.com/uploads/1/3/0/5/130590336/6533de31e5a.pdfIn PDF document text
    • http://heart-of-the-run.de/uploads/1/3/0/6/130604850/7500356.pdfIn PDF document text
    • http://scrubs4work.com/uploads/1/3/0/6/130604636/020b853be5ce8.pdfIn PDF document text
    • http://morristileva.com/uploads/1/3/1/6/131637728/8bdc6298cb2e.pdfIn PDF document text
    • http://escwire.com/uploads/1/3/0/4/130476114/1dd9d8.pdfIn PDF document text
    • http://theaveragejose.ca/uploads/1/3/0/7/130775071/radulakopibuxoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lagasig.files.wordpress.com/2020/06/xidubafojamurumipunutadev.pdfIn PDF document text
    • https://difimedo.files.wordpress.com/2020/06/89541573321.pdfIn PDF document text
    • https://biwijemafag333112286.files.wordpress.com/2020/06/zukufo.pdfIn PDF document text
    • https://lewoxosi.files.wordpress.com/2020/06/muvut.pdfIn PDF document text
    • https://tefaluvutas.files.wordpress.com/2020/06/65086638424.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 3

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_off0000c9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 10908 bytes
SHA-256: b2caaae630106adc55bc05321a12a7c8722cab647e937dc0ab87edaf35072c5b

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