Malicious PDF — malware analysis report

Static analysis result for SHA-256 578212f8b2aa5ca6…

MALICIOUS

PDF

42.0 KB Created: 2020-03-29 22:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 05645a5a472232f476a4eae1a1fc38da SHA-1: 5d0ad47c6a3c10378d00cc0f658dff3fb005a566 SHA-256: 578212f8b2aa5ca6516c88863809e07871c141d76b3a582d63679a12c2fcaeeb
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO poisoning attack. The document body text is largely unreadable, but the presence of the URL 'http://yinghuangwangshangyule.br3h.com/uploads/1/3/1/4/131409822/131409822.html#do+dogs+need+to+be+declawed' suggests a potential lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://yinghuangwangshangyule.br3h.com/uploads/1/3/1/4/131409822/131409822.html#do+dogs+need+to+be+declawed
    • http://missouricityinjurylawyers.com/uploads/1/3/1/3/131379815/lorutukol-moxowirivorepi-foguvo-paxumuje.pdf
    • http://letterstohillaryrc.com/uploads/1/3/0/7/130775277/2018998.pdf
    • http://nyjincho.com/uploads/1/3/0/2/130272083/8809394.pdf
    • http://good-wind.org/uploads/1/3/0/4/130483928/guwipawojupol.pdf
    • http://satromforhouse.com/uploads/1/3/0/6/130620966/9951765.pdf
    • http://lighteracu.com/uploads/1/3/0/4/130477152/cb02a6.pdf
    • http://sandybailes.com/uploads/1/3/0/6/130621066/5464150.pdf
    • http://resplendentbodycontouring.com/uploads/1/3/0/7/130740235/a586bf6b.pdf
    • http://manilavanhire.com/uploads/1/3/0/6/130604810/sujaso.pdf
    • http://08bbf7.com/uploads/1/3/0/2/130272902/b341232.pdf
    • http://palosverdesplumber.net/uploads/1/3/1/1/131163684/8780276.pdf
    • http://elijahjcobb.com/uploads/1/3/0/9/130969960/sipokasijub_wutivap_ragaradipa_zapebejomuped.pdf
    • http://gabinetkosmetycznymyslowice.pl/uploads/1/3/0/8/130814001/4374404.pdf
    • http://szummerpride.cn/uploads/1/3/0/7/130739809/zigifobefuwilewas.pdf
    • http://blissbagels.com/uploads/1/3/0/6/130605453/barabowesodo_xegevupo_daturafisik.pdf
    • http://nodeguard-demo-1.octarinesec.com/uploads/1/3/1/3/131382030/rijubaramesosas_rujipinisidoxeg_pikigilodexi_purivepidomexuk.pdf
    • http://cwhypnotherapy.com/uploads/1/3/0/7/130775306/562134.pdf
    • http://rhkeeper.com/uploads/1/3/0/5/130546354/nasolotu.pdf
    • http://kirjamuutokset.org/uploads/1/3/0/6/130603867/9102703.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b33.bin
dcbb26616d804fd988708b22b3da62558cb5fc74262af58498d7ad9bb2122625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B33 8196 bytes

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