Malicious PDF — malware analysis report

Static analysis result for SHA-256 e000d10f4a5025df…

MALICIOUS

PDF

48.7 KB Created: 2020-03-23 07:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 361513453ca15a4215d294d9f3176276 SHA-1: 59c15d54afa2f7dba7b4bcd24e981140d5dc5a1c SHA-256: e000d10f4a5025dfa1c2d8bb681297e6bd1ffaacafd45cd9d3402369cfca6c11
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The primary purpose appears to be SEO manipulation or directing users to potentially harmful content hosted on numerous domains. No scripts were extracted from this sample, limiting the analysis of specific malicious behaviors.

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://astoriakidsclub.com/uploads/1/3/0/7/130739669/130739669.html#libros+de+urbanismo+pdf
    • http://mindfulness-et-sport.com/uploads/1/3/0/7/130740044/kelamujitipik.pdf
    • http://scottspremier.net/uploads/1/3/0/8/130874118/1f782d697c1.pdf
    • http://webmail.eventsforafrica.com/uploads/1/3/0/9/130969130/ad71c.pdf
    • http://clusteredclosets.com/uploads/1/3/0/6/130639538/e5fcd.pdf
    • http://gonzaloyrociosecasan.com/uploads/1/3/1/1/131164542/powixusogasefuj.pdf
    • http://cab42.com/uploads/1/3/0/2/130271031/vewuzexobuginutir.pdf
    • http://www.grimsbyhousecleaning.com/uploads/1/3/0/6/130639822/b03a55fb44cad16.pdf
    • http://collectifcontraceptionliege.com/uploads/1/3/0/6/130639162/burovota-kemawinowabow-fifulopura-lujax.pdf
    • http://eeswfl.com/uploads/1/3/0/2/130271152/bazufasokiwer_lizujakow_fodeniwu_jomofajudawofe.pdf
    • http://www.upallnite.org/uploads/1/3/0/8/130873894/2319221.pdf
    • http://makeupartist-tork.com/uploads/1/3/0/7/130775830/woranifopa.pdf
    • http://on-tray.org/uploads/1/3/0/6/130622012/2888273.pdf
    • http://usedatvs.ca/uploads/1/3/0/7/130739867/7e7185.pdf
    • http://www.thejourneyforwardcoaching.com/uploads/1/3/0/5/130551661/289d2.pdf
    • http://abruckx.com/uploads/1/3/0/2/130289763/3843885.pdf
    • http://givingtreevillage.com/uploads/1/3/1/1/131163660/pikonidusa-zijunudebosuw-pagazixo.pdf
    • http://www.tsyorkpolebarnsandmetalroofsllc.com/uploads/1/3/0/5/130540172/7871965.pdf
    • http://printcopycards.com/uploads/1/3/0/2/130291809/gasibotinurutada.pdf
    • http://www.jchohlstern.com/uploads/1/3/0/8/130814845/bufovepotowidolibix.pdf
    • http://agfxinvestments.com/uploads/1/3/0/6/130639777/6800886.pdf
    • http://renmach.com/uploads/1/3/0/7/130775544/vodewejaruk-gasabotajidotov-nikipusubuda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ecf.bin
54c6cd4c4f55e1206d1478d9d405eb594c31438f9f668a6721321c42846002db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 9284 bytes
font_01_sfnt_off0000a03b.bin
977dbd173eca1f4f1417373ba8176450f89b7ca8e405274873b978f413fec4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA03B 16068 bytes

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