Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cfd623444582a7…

MALICIOUS

PDF

41.8 KB Created: 2020-05-15 17:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a52755790918a41fa39f7c1f0daee8bd SHA-1: 4e578ab43f9ca73cd7d031ca16740c4f9d07c1f9 SHA-256: e9cfd623444582a7db0f41e144bc39fda55594b4ec499918d3ccdbfc25fa2468
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body text, though partially corrupted, contains a URL that appears to be a lure for movie content. This suggests a link farm or SEO poisoning technique to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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://brandiefreeman.net/uploads/1/3/0/7/130740489/130740489.html#home+again+full+movie++mp4 PDF link annotation
    • http://nataliebatmitzvah.com/uploads/1/3/0/6/130639336/aa21959.pdfIn PDF document text
    • http://thriftsinthesticks.com/uploads/1/3/1/4/131413550/janemaxud.pdfIn PDF document text
    • http://achsp.com/uploads/1/3/0/7/130738789/dutowijekeripunux.pdfIn PDF document text
    • http://plot-360.com/uploads/1/3/0/4/130435892/4347283.pdfIn PDF document text
    • http://slibtec.nl/uploads/1/3/0/5/130551264/9534c465.pdfIn PDF document text
    • http://utagohouse.com/uploads/1/3/0/8/130813032/miwadajagizax.pdfIn PDF document text
    • http://90davida.com/uploads/1/3/0/5/130540683/rorekuxo.pdfIn PDF document text
    • http://angelaeischens.com/uploads/1/3/0/5/130543369/pakosofamoweju-fupolasigomoso.pdfIn PDF document text
    • http://iticsolutions.com/uploads/1/3/1/8/131860553/16db8daba84de.pdfIn PDF document text
    • http://fuelandmove.com/uploads/1/3/1/8/131856225/152092693088.pdfIn PDF document text
    • http://paddydemsey-art.com/uploads/1/3/0/6/130621214/367059.pdfIn PDF document text
    • http://roetsbrothersdrywall.net/uploads/1/3/0/4/130436140/e82803b098f.pdfIn PDF document text
    • http://islandadventureonline.com/uploads/1/3/1/4/131438874/zekeferewokadajur.pdfIn PDF document text
    • http://educatoryx.com/uploads/1/3/0/8/130813330/rizeduwewezawaro.pdfIn PDF document text
    • http://katanasushifh.com/uploads/1/3/0/7/130739188/jakavagetin.pdfIn PDF document text
    • http://bism9.com/uploads/1/3/1/6/131606009/917975.pdfIn PDF document text
    • http://dommebentley.com/uploads/1/3/0/3/130323163/4062237.pdfIn PDF document text
    • http://inspiringchangeguru.com/uploads/1/3/1/4/131408864/favilitomedagusiw.pdfIn PDF document text
    • http://southernoaksrestorationco.com/uploads/1/3/0/8/130813906/dc58dfeb465a.pdfIn PDF document text
    • http://kiranalangjaya.com/uploads/1/3/0/8/130814250/retikewe.pdfIn PDF document text
    • http://priscillaariana.com/uploads/1/3/1/4/131437283/a2af8c5b484.pdfIn PDF document text
    • http://nolaninvestigations.com/uploads/1/3/1/0/131070695/kopopumizofi-rifesezeje-wizuvojuv.pdfIn PDF document text
    • http://lincolnsrest.com/uploads/1/3/1/3/131383583/5945adfa.pdfIn PDF document text
    • http://smcconsulting.fr/uploads/1/3/1/4/131409926/voxij-memoma.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

Related samples 4

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_off0000765c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 10932 bytes
SHA-256: 1785889161ccbace47e3b23d2fee47e73cb39721ebfca37f9f7783db5533e183

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